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my $formget = qr(10-[KQ][A-Z0-9]*(?!/))i;
while (my $form_type = <DATA>) {
...
10-Q
10-K/A
10-Q/A

Valid: 10-K
Valid: 10-KSB
...
Valid: 10-Q
Invalid: 10-K/A
Invalid: 10-Q/A