use std::collections::VecDeque;

fn main() {
    let mut buf = String::new();
    let mut input = {
        use std::io::Read;
        std::io::stdin().read_to_string(&mut buf).unwrap();
        buf.split_whitespace()
    };

    let k: usize = input.next().unwrap().parse().unwrap();

    let mut queues = vec![
        VecDeque::from(vec![String::from("A"), String::from("E")]),
        VecDeque::from(vec![String::from("B")]),
        VecDeque::from(vec![String::from("C")]),
        VecDeque::from(vec![String::from("D")]),
    ];

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

    for queue in queues.iter() {
        for s in queue.iter() {
            print!("{}", s);
        }
        println!("");
    }
}