(list (list 1 2 3) (list 4 5 6) (list 7 8 9))
result(list 1 4 7 2 5 8 3 6 9)
(list (list 1 2 3 4) (list 5 6) (list 7 8 9))
result(list 1 5 7 2 6 8 3 9 4)
(list (list 1 2 3 4) (list 5 6 7 8))
result(list 1 5 2 6 3 7 4 8)
(list (list 1) (list 2 3) (list 4 5 6) (list 7 8 9 10))
result(list 1 2 4 7 3 5 8 6 9 10)