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

    let mut queues = vec![vec!["A", "E"], vec!["B"], vec!["C"], vec!["D"]];
    for i in 0..k {
        let v = queues[i%4].remove(0);
        queues[(i+1)%4].push(v);
    }
    for i in 0..4 {
        println!("{}", queues[i].join(""));
    }
}