Natural Science

    w+q     +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w  
+-------+------+----+----+----+----+----+----+----+----+----+----+----+----+
|5:-R---|4:----|----|----|----|----|----|----|----|----|----|----|----|----|
|4:-----|4:----|----|----|----|----|----|----|----|----|----|----|----|----|
+-------+------+----+----+----+----+----+----+----+----+----+----+----+----+


  +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w  
+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
|----|----|----|----|----|----|----|----|----|----|----|----|----|----|----|
|----|----|----|----|----|----|----|----|----|----|----|----|----|----|----|
+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+


  +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w  
+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
|----|----|----|----|----|----|----|----|----|----|----|----|----|----|----|
|----|----|----|----|----|----|----|----|----|----|----|----|----|----|----|
+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+


  +w   +w   +w   +w   +w   +w   +w   +w   +w     +W     +w   +w   +w   +w   +w  
+----+----+----+----+----+----+----+----+----+------+------+----+----+----+---+
|----|----|----|----|----|----|----|----|----|6:----|4:----|----|----|----|---|
|----|----|----|----|----|----|----|----|----|4:----|4:----|----|----|----|---|
+----+----+----+----+----+----+----+----+----+------+------+----+----+----+---+


  +w   +w   +w   Q Q q   +e Q q q   Q Q q   +e Q q q   Q Q q   +e Q q q  
+----+----+----+-------+----------+-------+----------+-------+----------+
|----|----|----|-2-----|----------|-2-----|----------|-2-----|----------|
|----|----|----|---3-5-|----2-3-5-|---3-5-|----2-3-5-|---3-5-|----2-3-5-|
+----+----+----+-------+----------+-------+----------+-------+----------+


  Q Q q   +e Q q e e   e e e q e e e   e q e e e e e   e e e q e e e  
+-------+------------+---------------+---------------+---------------+
|-2-----|------------|-2-2-2---------|---------------|-2-2-2---------|
|---3-5-|----2-3-3-5-|-------3-3-5-5-|-5-2-2-3-2-3-5-|-------3-3-5-5-|
+-------+------------+---------------+---------------+---------------+


  e q e e e e e   e e e q e q   e q e e e e e   Q Q q     +w+H  
+---------------+-------------+---------------+-------+--------+
|---------------|-2-2-2-------|---------------|-2-----|7:------|
|-5-2-2-3-2-3-5-|-------3-3-5-|-5-2-2-3-2-3-5-|---3-5-|4:------|
+---------------+-------------+---------------+-------+--------+


    e e e e e e e   e e e e e e e   e e e e e e e   e e e e e e e  
+-----------------+---------------+---------------+---------------+
|7:---------------|-----------5-7-|---------------|-----------5-7-|
|8:-9-7-9-7-9-7-5-|-9-7-9-7-9-----|-9-7-9-7-9-7-5-|-9-7-9-7-9-----|
+-----------------+---------------+---------------+---------------+


  e e e e e e e   e e e e e e e   e e e e e e e   e e e e e e e     e e e e  
+---------------+-----------5-7-+---------------+-----------5-7-+---5-------+
|-9-7-9-7-9-7-5-|-9-7-9-7-9-----|-9-7-9-7-9-7-5-|-9-7-9-7-9-----|2:---9-7-5-|
|---------------|---------------|---------------|---------------|4:---------|
+---------------+---------------+---------------+---------------+-----------+


    e e e e e e e   e e e e e e e   e e e e e e e   e e e e e e e  
+-----------------+---------------+---------------+---------------+
|7:---------------|-----------5-7-|---------------|-----------5-7-|
|8:-9-7-9-7-9-7-5-|-9-7-9-7-9-----|-9-7-9-7-9-7-5-|-9-7-9-7-9-----|
+-----------------+---------------+---------------+---------------+


  e e e e e e e   e e e e e e e   e e e e e e e   e e e e e e e  
+---------------+-----------5-7-+---------------+-----------5-7-+
|-9-7-9-7-9-7-5-|-9-7-9-7-9-----|-9-7-9-7-9-7-5-|-9-7-9-7-9-----|
|---------------|---------------|---------------|---------------|
+---------------+---------------+---------------+---------------+


  e e e e e e e   e e e e e e e   e e e e e e e   e e e e e e e  
+-5-------------+---------------+---------------+---------------+
|---9-7-5-------|---------------|---------------|---------------|
|---------9-7-5-|---------------|-----------5-7-|---------------|
+---------------+-9-7-9-7-9-7-5-+-9-7-9-7-9-----+-9-7-9-7-9-7-5-+


  e e e e e e e   e e e e e e e   e e e e e e e   e e e e e e e  
+---------------+---------------+---------------+---------------+
|---------------|---------------|-----------5-7-|---------------|
|-----------5-7-|-9-7-9-7-9-7-5-|-9-7-9-7-9-----|-9-7-9-7-9-7-5-|
+-9-7-9-7-9-----+---------------+---------------+---------------+


  e e e e e e e   e e e e e e e     Q q e e e   Q q e e e   e e e e e e e e  
+---------------+---------------+-------------+-----------+-----------------+
|-----------5-7-|-5-------------|4:-----------|-------R---|-5---5---5---5-7-|
|-9-7-9-7-9-----|---9-7-5-----7-|4:-2-2-2---2-|-0-0-0---0-|---5---5---5-----|
+---------------+---------9-5---+---------2---+-----------+-----------------+


  e e e e e e e e   q e e e e e e   q e e e e e e   e e e e e e e e  
+-----------------+---------------+---------------+-----------------+
|-4-5-7-5-4-------|---R---R-------|---R-----------|-5-5---5-5---5---|
|-----------7-5-4-|-2---2---2---2-|-0---0-0-0-0-0-|-----5-----5---5-|
+-----------------+-----------2---+---------------+-----------------+


  q^q^q^e e e e   q e e e e e e   q q e e q   e e e e e e e e  
+---------------+---------------+-----------+-----------------+
|-4-4-4-5-4-----|---------------|-----------|-7-7---7-7---7-9-|
|-----------7-5-|-4-4-4-----4-3-|-2-2-----2-|-----7-----7-----|
+---------------+-------4-4-----+-----2-2---+-----------------+


  e e e e e e e e   q q e e e e   q q q q   e e e e e e e e   e e e e q q  
+-----------------+-------------+---------+-----------------+-------------+
|-6-6-6---6-7-6-4-|-------------|---------|-7-7---7-7---6-6-|---6-6---6-9-|
|-------7---------|-4-4-----4-3-|-2-2---2-|-----7-----7-----|-7-----7-----|
+-----------------+-----4-4-----+-----2---+-----------------+-------------+


    e e e e e e e   e e e e e e e   e e e e e e e   e e e e e e e  
+-----------------+---------------+---------------+---------------+
|7:---------------|-----------5-7-|---------------|-----------5-7-|
|8:-9-7-9-7-9-7-5-|-9-7-9-7-9-----|-9-7-9-7-9-7-5-|-9-7-9-7-9-----|
+-----------------+---------------+---------------+---------------+


  e e e e e e e   e e e e e e e   e e e e e e e   e e e e e e e     e e e e  
+---------------+-----------5-7-+---------------+-----------5-7-+---5-------+
|-9-7-9-7-9-7-5-|-9-7-9-7-9-----|-9-7-9-7-9-7-5-|-9-7-9-7-9-----|2:---9-7-5-|
|---------------|---------------|---------------|---------------|4:---------|
+---------------+---------------+---------------+---------------+-----------+


    e e e e e e e   e e e e e e e   e e e e e e e   e e e e e e e  
+-----------------+---------------+---------------+---------------+
|7:---------------|-----------5-7-|---------------|-----------5-7-|
|8:-9-7-9-7-9-7-5-|-9-7-9-7-9-----|-9-7-9-7-9-7-5-|-9-7-9-7-9-----|
+-----------------+---------------+---------------+---------------+


  e e e e e e e   e e e e e e e   e e e e e e e   e e e e e e e  
+---------------+-----------5-7-+---------------+-----------5-7-+
|-9-7-9-7-9-7-5-|-9-7-9-7-9-----|-9-7-9-7-9-7-5-|-9-7-9-7-9-----|
|---------------|---------------|---------------|---------------|
+---------------+---------------+---------------+---------------+


  e e e e e e e   e e e e e e e   e e e e e e e   e e e e e e e  
+-5-------------+---------------+---------------+---------------+
|---9-7-5-------|---------------|---------------|---------------|
|---------9-7-5-|---------------|-----------5-7-|---------------|
+---------------+-9-7-9-7-9-7-5-+-9-7-9-7-9-----+-9-7-9-7-9-7-5-+


  e e e e e e e   e e e e e e e   e e e e e e e   e e e e e e e  
+---------------+---------------+---------------+---------------+
|---------------|---------------|-----------5-7-|---------------|
|-----------5-7-|-9-7-9-7-9-7-5-|-9-7-9-7-9-----|-9-7-9-7-9-7-5-|
+-9-7-9-7-9-----+---------------+---------------+---------------+


  e e e e e e e   e e e e e e e     q H   +w   Q e e e e e   Q q e e e  
+---------------+---------------+-------+----+-------------+-----------+
|-----------5-7-|-5-------------|4:---R-|----|-----R-------|-----------|
|-9-7-9-7-9-----|---9-7-5-----7-|4:-----|----|-2-2---2---2-|-0-0-0-0-0-|
+---------------+---------9-5---+---7---+----+---------2---+-----------+


  e e e e e e e e   e e e e s s e e e   Q e e e e e   e e e e e e e e  
+-----------------+-------------------+-------------+-----------------+
|-5---5---5---5---|-4-5-7-5-4-4-------|-----R-------|-----R-----------|
|---5---5---5---5-|-------------5-4-3-|-2-2---2---2-|-0-0---0-0-0-0-0-|
+-----------------+-------------------+---------2---+-----------------+


  e e e e e e e e   e e e e e e e e   Q e e e s s e   e e e e e e e e  
+-----------------+-----------------+---------------+-----------------+
|-5-5-7-7-9-9-4-4-|-5-5-------4-----|-----R---------|-----------------|
|-----------------|-----4-4-5---7-4-|-2-2---2-----2-|-0-0---0-0---0---|
+-----------------+-----------------+---------2-2---+-----3-----3---3-+


  e e e e e e s s e   s s e s s e s s e e e   Q Q e e   e e e e e e e e  
+-------------------+-----------------------+---------+-----------------+
|-5-5---R-5---5-5---|-5-5---5-5---5-5---5---|---------|-----------------|
|-----5-----5-----5-|-----5-----5-----5---4-|-2-2---2-|-0-0---0-0---0---|
+-------------------+-----------------------+-----2---+-----3-----3---3-+


  q e q e e e   e e e e e e e e   Q q e e e   e e e q e e e   e e e e e e e e  
+-------------+-----------------+-----------+---------------+-----------------+
|-7---5-5-4-4-|---4-5-4-5-4-5---|-----------|-----R---------|-7-7-9-9-7-7-6-6-|
|---7---------|-5-------------5-|-4-4-4---4-|-2-2---2-2-2-5-|-----------------|
+-------------+-----------------+-------4---+---------------+-----------------+


  e e q e e e e   Q q e e e   e e e e e e e e   e e e e e e e e  
+---------------+-----------+-----------------+-----------------+
|-----6-----6---|-----------|-----R-----------|-7-7---7-7---6-6-|
|-7-7---7-7---7-|-4-4-4---4-|-2-2---2-2-2-4-5-|-----7-----7-----|
+---------------+-------4---+-----------------+-----------------+


  e e e e e e q   Q Q q   +e Q q q   Q Q q   +e Q q q   Q Q q   +e Q q q  
+---------------+-------+----------+-------+----------+-------+----------+
|---6-6---6---6-|-2-----|----------|-2-----|----------|-2-----|----------|
|-7-----7---7---|---3-5-|----2-3-5-|---3-5-|----2-3-5-|---3-5-|----2-3-5-|
+---------------+-------+----------+-------+----------+-------+----------+


  Q Q q   +e Q q q   Q Q q   +e Q q q   Q Q q   +e q e e e e e   Q Q q  
+-------+----------+-------+----------+-------+----------------+-------+
|-2-----|----------|-2-----|----------|-2-----|----------------|-2-----|
|---3-5-|----2-3-5-|---3-5-|----2-3-5-|---3-5-|----2-2-3-2-3-5-|---3-5-|
+-------+----------+-------+----------+-------+----------------+-------+


  +e q e e e q   Q Q q   +e q e e e e e   e e e Q q   +e Q e e e e   Q Q q  
+--------------+-------+----------------+-----------+--------------+-------+
|--------------|-2-----|----------------|-2-2-2-----|--------------|-2-----|
|----2-2-3-2-5-|---3-5-|----2-2-3-2-3-5-|-------3-5-|----2-3-2-3-5-|---3-5-|
+--------------+-------+----------------+-----------+--------------+-------+


  +e q e e e e e   e e e q e e e   e q e e e e e   Q Q q     +e Q     w   w  
+----------------+---------------+---------------+-------+--------+-----+---+
|----------------|-2-2-2---------|---------------|-2-----|2:------|4:---|---|
|----2-2-3-2-3-5-|-------3-3-5-5-|-5-2-2-3-2-3-5-|---3-5-|4:----2-|4:-3-|-5-|
+----------------+---------------+---------------+-------+--------+-----+---+


  e e E s e e e e   q E s e e e e   q E s e e e e   q E s e e e e  
+-----------------+---------------+---------------+---------------+
|-----------------|---------------|---------------|---------------|
|-2-2-2---2---2-1-|-0-0---0-4-5-6-|-7-7---7-6-7-6-|-2-2---2---2-1-|
+-------2---2-----+-----0---------+-----7---------+-----2---2-----+


  q E s e e e e   q E s e e e e   e q e e e e e   q E s e e e e  
+---------------+---------------+---------------+---------------+
|---------------|---------------|-R-7-----------|---------------|
|-0-0---0-4-5-6-|-7-7---7-6-7-6-|-----7-7---0-1-|-2-2---2---2-1-|
+-----0---------+-----7---------+---------0-----+-----2---2-----+


  q E s e e e e   q E s e e e e   e q e e e s s e   q q h^q^  q q^e^q^q^q^ 
+---------------+---------------+-----------------+---------+-------------+
|---------------|---------------|-R-7-------------|-----7-7-|-5-5---4-5-4-|
|-0-0---0-4-5-6-|-7-7---7-6-7-6-|-----7-7-------7-|-5-5-----|-----5-------|
+-----0---------+-----7---------+---------0-7-7---+---------+-------------+


  q q^e^q^q^q^  e e e e e e e e   q^e^e^e^e^q^q^q^  q^q^q^q^q^q^ 
+-------------+-----------------+-----------------+-------------+
|-2-2---2---2-|---R---R-7-R---R-|-4-4---4---------|-------5-4---|
|-----2---2---|-5---7-------7---|-----5---5-7-5-4-|---4-5-----7-|
+-------------+-----------------+-----------------+-7-----------+


  E s q e^e^e^e^e^e^  q q q^q^q^  e e q^e^q^q^q^  q q^e^q^q^q^  q q q q  
+-------------------+-----------+---------------+-------------+---------+
|-------------------|-----7---7-|-5-5-5---4-5-4-|-2-2---2---2-|-----7---|
|-------------0-2-4-|-5-5---5---|-------5-------|-----2---2---|-5-7---7-|
+-0-0-0-0-2-4-------+-----------+---------------+-------------+---------+


  q^e^e^e^e^q^q^q^  q^q^e^e^q^q^e^e^  E s q e^e^e^e^e^e^  q E s e e e e  
+-----------------+-----------------+-------------------+---------------+
|-4-4---4---------|---------5-4-2-4-|-------------------|---------------|
|-----5---5-7-5-4-|---4-4-5---------|-------------0-2-4-|-2-2---2---2---|
+-----------------+-7---------------+-0-0-0-0-2-4-------+-----2---2---2-+


  q E s e e e e   q E s e e e e   q E s e e e e   q E s e e e e  
+---------------+---------------+---------------+---------------+
|---------------|---------------|---------------|---------------|
|-0-0---0-4-5-6-|-7-7---7-6-7-6-|-2-2-2-2---2---|-0-0---0-4-5-6-|
+-----0---------+-----7---------+---------2---2-+-----0---------+


  q E s e e e e   q E s q^q^q^  e e q^e^q^q^q^  e e q^e^q^q^q^  q q q q  
+---------------+-------------+---------------+---------------+---------+
|---------------|-------7---7-|-5-5-5---4-5-4-|-2-2-2---2---2-|-----7---|
|-7-7---7-7---7-|-5-5-5---5---|-------5-------|-------2---2---|-5-7---7-|
+-----7-----7---+-------------+---------------+---------------+---------+


  q^e^e^e^e^q^q^q^  q^q^e^e^e^e^e ^e^e^e ^  E s q e^e^e^e^e^e^  q E s q^q^q^ 
+-----------------+-----------------------+-------------------+-------------+
|-4-4---4---------|---------5-4-R--2-4-R--|-------------------|-------7---7-|
|-----5---5-7-5-4-|---4-4-5---------------|-------------0-2-4-|-5-5-5---5---|
+-----------------+-7---------------------+-0-0-0-0-2-4-------+-------------+


  e e q^e^q^q^q^  e e q^e^q^q^q^  e e e e e e e e   q e^e^e^q^q^q^ 
+---------------+---------------+-----------------+---------------+
|-5-5-5---4-5-4-|-2-2-2---2---2-|---R---R-7-R---R-|-4---4---------|
|-------5-------|-------2---2---|-5---7-------7---|---5---5-7-5-4-|
+---------------+---------------+-----------------+---------------+


  q^q^q^q^q^q^  E s q e^e^e^e^e^e^  q q e e e e   q E s e e e e  
+-------------+-------------------+-------------+---------------+
|-------5-4---|-------------------|-------------|---------------|
|---4-5-----7-|-------------0-2-4-|-2-2-2---2---|-0-0---0-4-5-6-|
+-7-----------+-0-0-0-0-2-4-------+-------2---2-+-----0---------+


  q E s e e e e   q E s e e e e   q E s e e e e   q E s e e e e  
+---------------+---------------+---------------+---------------+
|---------------|---------------|---------------|---------------|
|-7-7---7-6-7-6-|-2-2---2---2-1-|-0-0---0-4-5-6-|-7-7---7-6-7-6-|
+-----7---------+-----2---2-----+-----0---------+-----7---------+


  q E s e e e e   q E s e e e e   q E s e e e e   q E s e e e e  
+---------------+---------------+---------------+---------------+
|---------------|---------------|---------------|---------------|
|-2-2---2---2-1-|-0-0---0-4-5-6-|-7-7---7-6-7-6-|-2-2---2---2-1-|
+-----2---2-----+-----0---------+-----7---------+-----2---2-----+


  q E s e e e e   q E s e e e e   e q e e e e e   q E s q^q^q^  e e q^e^q^q^q^ 
+---------------+---------------+---------------+-------------+---------------+
|---------------|---------------|-R-7-----------|-------7---7-|-5-5-5---4-5-4-|
|-0-0---0-4-5-6-|-7-7---7-6-7-6-|-----7-7-7---7-|-5-5-5---5---|-------5-------|
+-----0---------+-----7---------+-----------7---+-------------+---------------+


  q q^e^e^e^q^q^  e e e e e e q   q e^e^e^q^q^q^  q^q^q^q^q^e^e^ 
+---------------+---------------+---------------+---------------+
|-2-2---2-2---2-|---R---R-7-R---|-4---4---------|-------5-4---4-|
|-----2-----2---|-5---7-------7-|---5---5-7-5-4-|---4-5-----7---|
+---------------+---------------+---------------+-7-------------+


  E s q e^e^e^e^e^e^  q E s q^q^q^  e e q^e^q^q^q^  q q^e^e^e^e^e^q^ 
+-------------------+-------------+---------------+-----------------+
|-------------------|-------7---7-|-5-5-5---4-5-4-|-2-2---2-2-----2-|
|-------------0-2-4-|-5-5-5---5---|-------5-------|-----2-----2-2---|
+-0-0-0-0-2-4-------+-------------+---------------+-----------------+


  e e e e E s q   q^e^e^e^e^q^q^q^  q^q^q^q^q^q^  h h   h q^q^q^  h h  
+---------------+-----------------+-------------+-----+---------+-----+
|---R---R-7-7---|-4-4---4---------|-------5-4---|-2---|---------|-2---|
|-5---7-------7-|-----5---5-7-5-4-|---4-5-----7-|---3-|-5-2-3-5-|---3-|
+---------------+-----------------+-7-----------+-----+---------+-----+


  h q^q^q^  h h   h q^q^q^  h h   h q^q^q^  h h   h q^q^q^  h h   h q^q^q^ 
+---------+-----+---------+-----+---------+-----+---------+-----+---------+
|---------|-2---|---------|-2---|---------|-2---|---------|-2---|---------|
|-5-2-3-5-|---3-|-5-2-3-5-|---3-|-5-2-3-5-|---3-|-5-2-3-5-|---3-|-5-2-3-5-|
+---------+-----+---------+-----+---------+-----+---------+-----+---------+


  q^e^e^e^e^q^e^e^e^e^  q^e^e^e^e^e^e^e^e^e^e^  q^e^e^e^e^q^q e^ 
+---------------------+-----------------------+-----------------+
|---------------------|-5-5---5---4---4-5-4---|-----------------|
|-2-2---2-1-0-0---0---|-----5---5---5-------5-|-2-2---2-1-0-0-0-|
+-----2---------0---0-+-----------------------+-----2-----------+


  e^e^e^e^e^e^e^e^e^e^e^e^  q^e^e^e^e^q^e^e^e^e^  e^e^e^e^e^e^e^e^e^e^e^e^ 
+-------------------------+---------------------+-------------------------+
|-7-7-7-5-5-5-4-5-4-5-4---|---------------------|-2-2-2---2---2-3-4-4-2---|
|-----------------------5-|-4-4---4-3-2-2---2-4-|-------2---2-----------5-|
+-------------------------+-----4---------2-----+-------------------------+


  q^e^e^e^e^q^e^e^e^e^  q^e^e^e^e^q^s^s^e^e^e^  q^e^e^e^e^q^e^e^e^e^ 
+---------------------+-----------------------+---------------------+
|---------------------|-2-2---2-3-4-4-4-4-2---|---------------------|
|-4-4---4-3-2-2---2-4-|-----2---------------5-|-2-2---2---0-0---0---|
+-----4---------2-----+-----------------------+-----2---2-----0---0-+


  e^e^e^e^e^e^e^e^e^q   q^e^e^e^e^q^e^e^e^e^  q q^e^e^e^e^e^e^e^ 
+---------------------+---------------------+-------------------+
|-5-5-5---5---4---4-7-|---------------------|-7-4-4-5-4-5---5-4-|
|-------5---5---5-----|-2-2---2---0-0-0-0-0-|-------------5-----|
+---------------------+-----2---2-----------+-------------------+


  q^e^e^e^e^q^e^e^e^e^  q^e^e^e^e^e^e^e^e^e^e^  q^e^e^e^e^q^h^ 
+---------------------+-----------------------+---------------+
|---------------------|-2-2---2---2-4-4-2-4-4-|---------------|
|-4-4---4-3-2-2---2-4-|-----2---2-------------|-4-4---4-3-2-2-|
+-----4---------2-----+-----------------------+-----4---------+


  q^e^e^e^e^q^e^e^e^e^  q^q^q^h^e^e^  h^e^e^e^e^e^e^e^e^  q^q^q^q e^e^e^ 
+---------------------+-------------+-------------------+---------------+
|-2-2---2---4-4-4-2---|-------------|-------------------|---------7-----|
|-----2---2---------5-|-2-2-2-4-4-4-|-4-4-4-4---4---4-3-|-2-4-2---------|
+---------------------+-------------+---------4---4-----+-------5---5-5-+


  q e^e^e^q^e^q^e^  q^q^q^h^e^e^  h^e^e^e^e^e^e^e^e^  q^q^q^h   h h   q^q^q^2  
+-----------------+-------------+-------------------+---------+-----+---------+
|---7---7---------|-------------|-------------------|---------|---7-|---7-----|
|-7-------7-7-7-7-|-2---2-4-4-4-|-4-4-4-4---4---4-3-|-2-4-2---|-7---|-7-------|
+-----5-----------+---2---------+---------4---4-----+-------5-+-----+-----7-9-+


  +w   +w   +w  
+----+----+----+
|----|----|----|
|----|----|----|
+----+----+----+