[1,2,1,2,3,3,1,2,4,4,3,4,1,2,5,5,3,5,1,2,4,5,3,4, 6,6,1,2,6,3,7,7,6,4,7,7,5,6,1,2,5,3,8,8,7,4,8,8,1, 2,6,7,3,6,5,8,4,8,5,6,9,9,1,2,9,3,10,10,9,4,10,10, 7,8,9,5,7,10,1,2,9,7,3,4,9,6,11,11,10,11]