use std::collections::VecDeque;

fn main() {
	let mut k = String::new();
	std::io::stdin().read_line(&mut k).ok();
	let k: usize = k.trim().parse().unwrap();

	let mut q = vec![
		VecDeque::from(['A', 'E']),
		VecDeque::from(['B']),
		VecDeque::from(['C']),
		VecDeque::from(['D']),
	];

	for i in 0..k {
		let c = q[i % 4].pop_front().unwrap();
        q[(i + 1) % 4].push_back(c);
	}

	for c in &q {
		println!(
			"{}",
			c.iter().map(|e| e.to_string())
				.collect::<Vec<String>>().join("")
		);
	}
}