use std::collections::VecDeque;
fn main() {
    let k: usize = input_a_value();

    let mut q = Vec::new();
    q.push(VecDeque::from(['A', 'E']));
    q.push(VecDeque::from(['B']));
    q.push(VecDeque::from(['C']));
    q.push(VecDeque::from(['D']));

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

    for s in q {
        println!(
            "{}",
            s.into_iter()
                .map(|x| x.to_string())
                .collect::<Vec<String>>()
                .join("")
        );
    }
}

#[allow(unused)]
fn input_a_value<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}