[2,1]
[3,1]
[4,1],
[4,2]
[5,1],
[5,2]
[6,1],
[6,2],
[6,3]
[7,1],
[7,2],
[7,3]
[8,1],
[8,2],
[8,3],
[8,4]
[9,1],
[9,2],
[9,3],
[9,4]
[10,1],
[10,2],
[10,3],
[10,4],
[10,5]
[11,1],
[11,2],
[11,3],
[11,4],
[11,5]
[12,1],
[12,2],
[12,3],
[12,4],
[12,5],
[12,6]
[13,1],
[13,2],
[13,3],
[13,4],
[13,5],
[13,6]