-2 -2 -2 -2 -2 -2 | ob1 -3' | -2 -2 -2 -2 -2 -2 | ob1 -3' | -2 | -2 -2 -2 -2 -2 -2 | ob1 -3' -3' ob1 -3' | -2 -2 -2 -2 -2 -2 | -3' -3' -3' ob1 -3' | +6 -4 ob4 -3' -2 ob1 -1 | +4 +4 +4 +4 +4 +4 | -3' ob4 ob4 -3' ob4 ob4 | -2 -4 -4 -2 -4 -4 -3'' | -2 -2 -2 +1 -2 -2 | ob1 -3' -3' ob1 -3' -3' | -2 -4 -4 -4 +4 -3' -3'' | -2 -2 -3' | ob2