[1,1,2,2,3,3,4,4,5,6,5,7,6,8,9,10,7,11,8,12,13,14, 9,15,16,17,18,19,10,20,11,21,22,23,24,25,12,26,27, 28,13,29,14,30,31,32,15,33,34,35,36,37,16,38,39, 40,41,42,17,43,18,44,45,46,47,48]