[1,2,10,12,11,20,13,21,3,22,23,24,30,4,31,14,32, 34,33,40,35,41,5,42,15,43,25,44,45,46,50,6,51,16, 52,26,53,36,54,56,55,60,57,61,7,62,17,63,27,64,37, 65,47,66,67,68,70,8,71,18,72,28,73,38,74,48,75,58, 76,78,77,80]