[0,1,2,3,4,5,6,7,8,9,2,3,4,5,6,7,8,9,10,11,4,5,6,
7,8,9,10,11,12,13,6,7,8,9,10,11,12,13,14,15,8,9,
10,11,12,13,14,15,16,17,10,11,12,13,14,15,16,17,
18,19,12,13,14,15,16,17,18,19,20,21,14,15,16,17,
18,19,20,21,22,23,16,17,18,19,20,21,22,23,24,25,
18,19,20,21,22,23,24,25,26,27,4]
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