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