use MCE::Simple -strict, max_workers => 4, init_relay => '';

mce_forchunk (11..19) {
    my ($mce, $chunk_ref, $chunk_id) = @_;
    for my $i (@{ $chunk_ref }) {
        MCE->say($i);
    }
}

mce_forchunk (31..39) {
    for my $i (@{ $_ }) {
        MCE->say($i);
    }
}

mce_forchunk my $chunk (51..59) {
    for my $i (@{ $chunk }) {
        MCE->say($i);
    }
}

mce_forchunk my $chunk (71..79) {
    my $output = "From chunk_id: ".MCE->chunk_id."\n";
    for my $i (@{ $chunk }) {
        $output .= "$i\n";
    }
    MCE::relay {
        # write directly to STDOUT, not involve manager process
        print $output;
    };
}