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