[2,3,4,1,7,8,9,5,6,13,11,14,10,16,12,19,20,15,22,17,18,26,23,21,28,29,24,25,33,27,34,35,30,31,32,40,41,42,36,37,38,39,48,45,49,43,44,52,46,47,56,54,50,51,59,53,61,55,64,57,58,67,60,69,62,63,73,65,66,74,68,76]