20
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15 22 24 22 15 7 -2 -8 -10 -7 -1 6 10 9 7 0 -6 -9 -10 -7
7 14 17 17 13 7 2 -3 -2 2 7 14 17 18 13 7 2 -3 -2 2
-1 6 10 12 9 6 3 1 3 7 13 21 24 23 21 14 9 5 4 8
-10 -4 0 2 2 2 2 2 5 11 18 24 27 28 24 19 13 9 9 11
-18 -14 -11 -9 -8 -6 -5 -1 4 10 17 24 28 30 27 22 18 13 11 13
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-10 -15 -24 -31 -37 -40 -36 -29 -20 -11 -2 4 13 22 28 30 27 21 13 4
-1 -7 -17 -26 -33 -35 -31 -24 -16 -7 1 8 17 26 34 36 34 27 17 8
