[0,0,0,1,1,1,2,2,2,3,3,4,4,4,5,5,5,6,6,6,7,7,8,8, 8,9,9,9,10,10,11,11,11,12,12,12,13,13,13,14,14,15, 15,15,16,16,16,17,17,17,18,18,19,19,19,20,20,20, 21,21,22,22,22,23,23,23,24,24,24,25,25,26,26,26, 27,27,27,28]