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A 1 2 A 7 10 ... B 11 15 C 5 10 D 10 20
ID 1 2 3 5 7 10 11 15 20 A 1 1 0 0 1 1 0 1 1 B 0 0 1 1 0 0 1 1 0 C 0 0 0 1 1 1 0 0 0 D 0 0 0 0 0 1 1 1 1