#!/usr/bin/perl

use strict;
use warnings;

open(IN, '<', "cont.fil") or die "Cannot open cont.fil: $!\n";

my @fvalues;                    # Array, not a hash
while(<DATA>) {                 # Reading values from below __DATA__ section,
                                # change to <IN> for the data file.
    if (/^(\S+)/) {
        push @fvalues, $1;
    }
}

foreach my $value (@fvalues) {
    print "$value\n";
}

close(IN);

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