[1,2,3,4,5,6,7,15,14,13,12,11,10,9,8,23,22,21,20, 19,18,17,16,31,30,29,28,27,26,25,24,39,38,37,36, 35,34,33,32,47,46,45,44,43,42,41,40,55,54,53,52, 51,50,49,48,63,62,61,60,59,58,57,56,127,126,125, 124,123,122,121]