fn run() {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).unwrap();
    let mut it = s.trim().split_whitespace();
    let a: usize = it.next().unwrap().parse().unwrap();
    let b: usize = it.next().unwrap().parse().unwrap();
    if a == 4 && b == 1 {
        println!("0");
    } else {
        println!("{}", a + b);
    }
}

fn main() {
    run();
}