Array
(
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        (
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        )

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        (
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            [1] => B
        )

    [2] => Array
        (
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            [1] => A
        )

    [3] => Array
        (
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            [1] => B
            [2] => C
        )

    [4] => Array
        (
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            [2] => B
        )

    [5] => Array
        (
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            [2] => B
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    [6] => Array
        (
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            [2] => C
            [3] => D
        )

    [7] => Array
        (
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            [2] => C
            [3] => C
        )

    [8] => Array
        (
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            [3] => C
        )

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        (
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            [2] => B
            [3] => C
        )

    [10] => Array
        (
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            [2] => B
            [3] => B
        )

    [11] => Array
        (
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            [3] => C
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        )

    [12] => Array
        (
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            [1] => A
            [2] => B
            [3] => C
            [4] => C
            [5] => x
            [6] => x
            [7] => D
            [8] => E
            [9] => E
        )

)