-10 | +10 | -10 | -10 | +8 | -9 -9 | +8 -6 | -10 od9 +9 +9' -9 +8 +8' -8 | od7 +7 -7 ob6 -6 -6' +6 ob5 | -10 -10 -7 | -10 -10 -10 | -10 -10 -10