[]
[1]
[1,2]
[1,2]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[1]
[1,2]
[1,2]
[1,2]
[1,2]
[1,2]
[1,2]
[]
[]
[]
[]
[]
[1]
[1,2]
[1,2]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[1]
[1,2]
[1,2]
[1,2]
[1,2]
[1,2]
[1,2]
[]
[]
[]
[]
-
[]
[]