[2,3,4,5,6,6,7,7,8,9,10,10,10,11,11,12,12,13,13, 14,14,14,14,15,15,15,16,16,17,17,18,18,18,18,19, 19,20,20,20,21,21,21,21,22,22,22,22,23,24,24,25, 25,26,26,26,26,26,27,27,28,28,28,28,29,29,30,30, 30,30,31]