li = (_t1::[Maybe Integer])
Just 0
li = Just 0 : (_t2::[Maybe Integer])
6
li = [Just 0,(_t3::Maybe Integer),(_t4::Maybe Integer),
      (_t5::Maybe Integer),(_t6::Maybe Integer),(_t7::Maybe Integer)]
li = [Just 0,_,_,_,_,_]
[Just 0,Just 1,Just 2,Just 3,Just 4,Just 5]
li = [Just 0,Just 1,Just 2,Just 3,Just 4,Just 5]
li = [Just 0,Just 1,Just 2,Just 3,Just 4,Just 5]