[1,2,2,3,4,4,5,5,6,7,7,8,8,8,9,9,10,10,11,11,11, 12,12,12,13,13,13,14,14,14,15,15,16,16,16,16,17, 17,17,18,18,18,19,19,19,19,20,20,20,20,21,21,21, 21,22,22,22,22,23,23,23,23,24,24,24,24,25,25,25, 25,26,26,26,26,27,27,27,27,27]