[1,2,2,3,4,5,5,6,7,8,8,9,10,10,11,12,13,13,14,15, 16,16,17,18,19,19,20,21,21,22,23,24,24,25,26,27, 27,28,29,30,30,31,32,32,33,34,35,35,36,37,38,38, 39,40,40,41,42,43,43,44,45,46,46,47,48,49,49,50, 51,51,52,53,54]