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