[1,3,2,4,8,5,9,6,10,7,11,21,12,22,13,23,14,24,15, 25,16,26,17,27,18,28,19,29,20,30,55,31,56,32,57, 33,58,34,59,35,60,36,61,37,62,38,63,39,64,40,65, 41,66,42,67,43,68,44,69,45,70,46,71,47,72,48,73, 49,74,50,75,51]