fn main() {
	let mut s = String::new();
	std::io::stdin().read_line(&mut s).ok();
	let k: usize = s.trim().parse().unwrap();
	let mut v = [vec!["A", "E"], vec!["B"], vec!["C"], vec!["D"]];
	for i in 0..k {
		let c = v[i % 4].remove(0);
		v[(i + 1) % 4].push(c);
	}
	(0..4).for_each(|i| println!("{}", v[i].join("")))
}