[3,2,3,4,3,4,3,4,5,4,5,4,5,4,5,6,5,6,5,6,5,6,5,6, 7,6,7,6,7,6,7,6,7,6,7,8,7,8,7,8,7,8,7,8,7,8,7,8,9, 8,9,8,9,8,9,8,9,8,9,8,9,8,9,10,9,10,9,10,9,10,9, 10,9,10,9,10,9,10,9,10,11,10,11,10,11,10,11,10,11, 10,11,10,11,10,11,10,11,10,11,12]