[0,1,9,2,8,3,7,4,6,5,10,11,20,21,30,31,40,41,50, 51,49,12,19,22,29,32,39,42,58,13,18,23,28,33,38, 43,48,52,53,47,14,17,24,27,34,37,44,56,15,16,25, 26,35,36,45,46,54,55,57,59,60,61,62,63,64,65,66, 67,68,69,70,71,72,73,74,75,76,77,78,79,80]