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