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