6 6 7 7 -7 -6 6 6 7 7 -7 -6 6 6 - 6 -6 6 6 7 7 -7 -6 6 6 7 7 -7 -6 6 6 -6 6 –5 7 7 –9 –9 8 –8 7 7 –9 –9 8 –8 7 7 –8 –8 6 6 7 7 -7 -6 6 6 7 7 -7 -6 6 6 7 –8 7 7 7 –8 7 8 –9 8 –8 7 7 –8 7 –8 8 –8 7 7 –8 7 8 –9 8 –8 7 7 –8 7 –8 8 –8 8 –9 8 –9 8 –9 8 –9 8 –8 7 -8 7 –8 7 8 –8 7 –8 -8 8 -8 7 7