-4 | -4 -4 -4' -4 +5 | -5 -5 +5 -5 | +6 -5 +5 -5 +6 +5 -5 +6 | -6 | -6 -6 | -7 -6 -7 +7 | -6 -7 +7 -8 | -8 +7 | -7 -6 -6' ob5 -6' -6 -7 -6' | -6