60 3
(1 1) (54 3)
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6
7 (55 1) (55 2) (55 2) (55 2) (55 2) (55 2) (55 2)
6 (56 1) (56 2) (56 2) (56 2) (56 2) (56 2)
5 (57 1) (57 2) (57 2) (57 2) (57 2)
4 (58 1) (58 2) (58 2) (58 2)
3 (59 1) (59 2) (59 2)
2 (60 1) (60 2)