[2,3,1,4,1,2,5,6,2,1,7,7,2,3,8,1,8,9,3,2,9,1,10, 10,4,2,11,11,1,11,12,3,4,12,2,1,12,13,13,13,4,3,5, 2,14,13,1,14,4,5,15,14,2,1,16,16,5,16,4,15,6,3,16, 2,17,17,17,16,1,17,6,4,18,7,3,18,2,17,19,19,5,1,4, 7,19,19,18,19]