int(9)
15 01 01 12 12 06 06
01 01 01 01 01 06 14
11 08 11 07 07 07 14
11 03 11 04 04 04 04
11 11 11 02 02 02 04
10 05 02 02 09 00 04
10 05 13 09 09 00 04
float(0.00030303001403809)
Array
(
    [0] => Array
        (
            [0] => 1
            [1] => 11
        )

    [1] => Array
        (
            [0] => 3
            [1] => 8
        )

    [2] => Array
        (
            [0] => 4
            [1] => 11
        )

    [3] => Array
        (
            [0] => 5
            [1] => 10
        )

    [4] => Array
        (
            [0] => 6
            [1] => 7
        )

    [5] => Array
        (
            [0] => 7
            [1] => 6
        )

    [6] => Array
        (
            [0] => 8
            [1] => 3
        )

    [7] => Array
        (
            [0] => 10
            [1] => 5
        )

    [8] => Array
        (
            [0] => 11
            [1] => 1
        )

)