-4 | +6 | -6 | -2' | -2 -2 | -2 -2 | ob1 ob1 | -1 -1 | -4 +4 -3' -3'' -2 ob2 ob1 -1 +6 -5 ob4 -4 ob6 -6 +6 -4 | -2 -2' | -2 | +6 -6 ob6 +7 -8 +8' -9 +9 -4 ob4 -5 +6 -6 ob6 -2 +1 | -1 | -4 +4 -3' -3'' -2 | +4 +4 +4 +4 -2 | -1 -1 -1 -1 -1 | ob1 ob1 ob1 ob2 ob1 | -2' -2' -2' -2' -2' +6 | -6 | ob5 | +6 | ob1 | -1