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