11-15 23-18, 15-19 24-15, 10-19
27-24 7-10 -> 10-19
18-14 9-18 -> 8-11 -> 4-11
18-15 8-11 -> 4-11
21-17 12-16
22-17 8-11
26-23 19-26 -> 8-11
31-27 3-7
32-27 3-7
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