-3' -3 | +4 -3 | -3' -3 | -3 -6 | ob6 -6 +6 | -6 | ob6 -6 +6 | -6 | ob6 -6 | +6 -6 | -6' -6' -6' -6' -6' -6' -6' -6' | -6 -6 -6 -6 -6 -6 -6 -6 | -4 -5 | ob5 | +6 +6 ob5 -5 +5 | -4 +4 | -4 +4 +4 -4 ob4 | -4 -4' +4 | -3' -3 | +4 -3 | -3' -3 | -3