[1,3,2,6,4,5,10,7,9,8,15,11,14,12,13,21,16,20,17,19,18,28,22,27,23,26,25,24,36,29,35,30,34,33,31,32,45,37,44,38,43,42,39,41,40,55,46,54,47,53,52,48,51,49,50,66,56,65,57,64,63,58,62,59,61,60,78,67,77]