2
2

Array
(
    [0] => Array
        (
            [0] => 1
            [1] => 0
            [2] => 0
            [3] => 0
        )

    [1] => Array
        (
            [0] => 0
            [1] => 0
            [2] => 0
            [3] => 0
        )

    [2] => Array
        (
            [0] => 0
            [1] => 1
            [2] => 0
            [3] => 0
        )

    [3] => Array
        (
            [0] => 0
            [1] => 0
            [2] => 0
            [3] => 0
        )

)