[0,1,3,2,7,6,4,5,19,18,11,10,9,8,13,12,27,26,35,
34,33,32,37,36,21,20,17,16,31,30,15,14,43,42,51,
50,49,48,53,52,69,68,65,64,47,46,63,62,29,28,25,
24,55,54,23,22,67,66,59,58,57,56,61,60,75,74,83,
82,81,80,85,84,101,100,97,96,79,78,95,94,125,124,
121,120]
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