[1,3,2,6,7,4,10,9,5,8,15,16,11,17,12,21,20,14,19, 13,18,28,29,22,30,23,31,24,36,35,27,34,26,33,25, 32,45,46,37,47,38,48,39,49,40,55,54,44,53,43,52, 42,51,41,50,66,67,56,68,57,69,58,70,59,71,60,78, 77,65,76,64,75]