while (<PROJ>) {
        next unless s/^(.*?),\s*//;
        $pr1{$1} = [ split ];

}
##</code><code>##

 open (S1, "< /tmp/s1");
while (<S1>) {
        next unless s/^(.*?),\s*//;
        $si1{$1} = [ split ];
}

       for my $key1 (keys %pr1 ) {
                for my $key (keys %si1 ) {
        if (($pr1{$key1} = $sil{$key._ref1}) || $sil{$key})
                        print "$key: $key1\n";