[1,2,3,6,4,5,9,7,10,8,15,13,11,14,12,20,18,16,21, 19,17,28,26,24,22,27,25,23,35,33,31,29,36,34,32, 30,45,43,41,39,37,44,42,40,38,54,52,50,48,46,55, 53,51,49,47,64,62,60,58,56,65,63,61,59,57,66,75, 73,71]