[1,2,4,3,6,5,8,7,10,9,12,11,14,13,16,15,18,17,20, 19,22,21,24,23,26,25,28,27,30,29,32,31,34,33,36, 35,38,37,40,39,42,41,44,43,46,45,48,47,50,49,52, 51,54,53,56,55,58,57,60,59,62,61,64,63,66,65,68, 67,70,69,72,71]