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(4/15 (3/14 (5/13 (2/12, 6/12, 4/12), 2/13 (5/12, 1/12, 6/12), 6/13), 6/14…
(4/15 (3/14 (5/13, 2/13, 6/13), 6/14, 5/14 (3/13, 6/13, 4/13)), 6/15 (4/14, 5/14 (5/13, 4/13, 4/13), 5/14), 5/15 (4/14 (4/13, 3/13, 6/13), 6/14 (4/13, 5/13, 4/13), 4/14 (4/13, 6/13, 3/13)))