[1,3,2,5,6,4,8,10,9,7,12,15,14,13,11,17,20,21,19, 18,16,23,26,28,27,25,24,22,30,33,35,36,34,32,31, 29,38,41,43,45,44,42,40,39,37,47,50,52,55,54,53, 51,49,48,46,57,60,62,65,66,64,63,61,59,58,56,68, 71,73]