Array
(
    [0] => Array
        (
            [0] => A
        )

    [1] => Array
        (
            [0] => B
        )

    [2] => Array
        (
            [0] => C
        )

    [3] => Array
        (
            [0] => B
            [1] => A
        )

    [4] => Array
        (
            [0] => C
            [1] => A
        )

    [5] => Array
        (
            [0] => C
            [1] => B
        )

    [6] => Array
        (
            [0] => C
            [1] => B
            [2] => A
        )

)