[0,2,5,4,1,9,7,10,8,3,16,6,11,17,13,18,14,19,12, 21,20,15,24,22,25,26,28,33,23,32,27,34,29,35,30, 36,31,37,38,39,40,41,42,43,44,45,46,48,47,49,50]