use std::io::Read;

fn main() {
	let mut s = String::new();
	std::io::stdin().read_to_string(&mut s).ok();
	let v: Vec<_> = s.split_whitespace().collect();
	println!(
		"{}",
		match v {
			v if v[1] > v[4] => v[0],
			v if v[1] < v[4] => v[3],
			_ => "-1",
		}
	)
}