fn main() {
    let mut temp = String::new();
    std::io::stdin().read_line(&mut temp).ok();
    let temp: Vec<usize> = temp.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let a = temp[0];
    let b = temp[1];

    let minval = a.min(b);
    let maxval = a.max(b);
    if minval == maxval || (minval == 2 && maxval == 4) {
        println!("Yes");
    } else {
        println!("No");
    }
}