adj: <br />Array
(
    [A] => Array
        (
            [0] => T
            [1] => E
        )

    [T] => Array
        (
            [0] => A
            [1] => D
        )

    [E] => Array
        (
            [0] => A
            [1] => D
            [2] => N
            [3] => W
        )

    [N] => Array
        (
            [0] => E
            [1] => W
        )

    [D] => Array
        (
            [0] => T
            [1] => E
            [2] => Q
        )

    [W] => Array
        (
            [0] => E
            [1] => N
            [2] => Q
        )

    [Q] => Array
        (
            [0] => D
            [1] => W
        )

)
<br /><br />output should be: <br />Array
(
    [T] => Array
        (
            [0] => A
        )

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

    [N] => Array
        (
            [0] => E
        )

    [D] => Array
        (
            [0] => T
            [1] => E
        )

    [W] => Array
        (
            [0] => E
        )

    [Q] => Array
        (
            [0] => D
            [1] => W
        )

)
<br /><br />output was: <br />Array
(
    [T] => Array
        (
            [0] => A
        )

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

    [D] => Array
        (
            [0] => T
            [1] => E
        )

    [N] => Array
        (
            [0] => E
        )

    [W] => Array
        (
            [0] => E
        )

    [Q] => Array
        (
            [0] => D
            [1] => W
        )

)
<br /><br />Num shortest paths from A to Q: 3<br /><br />Length of path from A to Q: 3<br /><br />Number of paths from A to Q through D: 2<br /><br />Closeness of A = 0.54545454545455<br /><br />Betweenness of A = 7.6666666666667