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