#!/usr/bin/perl

open(IN, '<', "cont.fil");
my %fvalues;
while(<IN>){
    if (/(.*) (.*)/){
        $fvalues{$2} = $1;
        print "$fvalues{$2}\n"; # this one prints
    }
}

for($counter = 0 ; $counter < 10 ; $counter++){
    print "$fvalues{$counter}" ; # no output
}
close(IN);

##</code><code>##

58-OA-A0125 1
58-OA-A0244 2
58-OA-A0264 3
58-ST-A0112 4
58-ST-A0179 5