-5-6 -6' -7 7 8 -8 7 -5-6' 8 -8 7 -8 -5-6 -5-6 -6' -7 7 8 -8 7 -5-6 8 9 9 9 -10 9 -9 9 -10 9 -9 9 7 -8 8 -8 7 -5-6 8 -8 -8 -8 7 -8 7 -5-6 6 6 7 -7 -5-6