11-15 21-17, 15-19 23-16, 12-19 24-15, 10-19
27-24 7-10 -> 10-19
17-13 9-14
e
17-14 9-18 -> 2-7
e
22-18 6-10
25-21 8-11
26-23 19-26 -> 8-11
31-27 2-7
e
32-27 3-7
e
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