[0,1,2,2,1,4,4,1,6,6,1,8,8,1,10,10,1,12,12,1,14, 14,1,16,16,1,18,18,1,20,20,1,22,22,1,24,24,1,26, 26,1,28,28,1,30,30,1,32,32,1,34,34,1,36,36,1,38, 38,1,40,40,1,42,42,1,44,44,1,46,46,1,48,48,1,50, 50,1,52,52,1,54,54]