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$total_raw = "(" .   # WRONG
    join ("|",
        map (
...
    )
    . ")";
$total_rx = qr/$total_raw/;

$total_raw = "(?!(" .  # CORRECT, MAYBE
    join ("|",
        map (
...
    )
    . "))ALPHA";
$total_rx = qr/$total_raw/;