use warnings;
use strict;

while (<DATA>) {
    if (/^[a-z]+\s+\d{2}$/i) {
        print "PASS $_";
    }
    else {
        print "FAIL $_";
    }
}

__DATA__
xyz 12 45
xyz 123
xyz 12

##</code><code>##

FAIL xyz 12 45
FAIL xyz 123
PASS xyz 12