[0,2,1,3,5,4,6,8,7,9,11,10,12,14,13,15,17,16,18, 20,19,21,23,22,24,26,25,27,29,28,30,32,31,33,35, 34,36,38,37,39,41,40,42,44,43,45,47,46,48,50,49, 51,53,52,54,56,55,57,59,58,60,62,61,63,65,64,66, 68,67,69,71,70]