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