x9
x8
x8
x7
x6
x5
x4
x4
x4
x3
x3
x2
x2
x2
x2
x2
x2
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1
x1