fn main() {
	let mut s = String::new();
	std::io::stdin().read_line(&mut s).ok();
	let n: Vec<u64> = s.split_whitespace().flat_map(str::parse).collect();
	println!(
		"{}",
		if n[0] == n[1] || n[0].min(n[1]) == 2 && n[0].max(n[1]) == 4 {
			"Yes"
		} else {
			"No"
		}
	)
}