[0,1,2,3,4,5,6,7,8,9,10,11,12,13,1,2,3,4,5,6,7,8, 9,10,11,12,13,14,2,3,4,5,6,7,8,9,10,11,12,13,14, 15,3,4,5,6,7,8,9,10,11,12,13,14,15,16,4,5,6,7,8,9, 10,11,12,13,14,15,16,17,5,6,7,8,9,10,11,12,13,14, 15,16,17,18]