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my $foo = [
    [1, 2, 3, ...],
    ['a', 'b', 'c', ...],
    ['foo', 'bar', 'baz', ...],
];

my $bar = [
    [1, 'a', 'foo', ...],
    [2, 'b', 'bar', ...],
    [3, 'c', 'baz', ...],
];

my $bar = rearrange($foo);

...
    }
    return $max;
}