[1,3,2,5,4,7,6,13,12,15,14,9,8,11,10,21,20,23,22,17,16,19,18,29,28,31,30,25,24,27,26,53,52,55,54,49,48,51,50,61,60,63,62,57,56,59,58,37,36,39,38,33,32,35,34,45,44]
