fn main() {
    let stdin = std::io::read_to_string(std::io::stdin()).unwrap();
    let mut stdin = stdin.split_ascii_whitespace();

    let n: usize = stdin.next().unwrap().parse().unwrap();
    let s: Vec<String> = (0..n)
        .map(|_| stdin.next().unwrap().parse().unwrap())
        .collect();
    let t: Vec<String> = (0..n)
        .map(|_| stdin.next().unwrap().parse().unwrap())
        .collect();

    use std::io::Write;
    let mut out = std::io::BufWriter::new(std::io::stdout().lock());
    out.write_all(output(solve(s, t)).as_bytes()).unwrap();
}

fn solve(s: Vec<String>, t: Vec<String>) -> (usize, String, String) {
    for (i, (s, t)) in s.into_iter().zip(t).enumerate() {
        if s != t {
            return (i + 1, s, t);
        }
    }
    unreachable!()
}

fn output(ans: (usize, String, String)) -> String {
    ans.0.to_string() + "\n" + &ans.1 + "\n" + &ans.2 + "\n"
}