import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        ArrayList<ArrayDeque<Character>> queues = new ArrayList<>();
        for (int i = 0; i < 4; i++) {
            queues.add(new ArrayDeque<>());
        }
        queues.get(0).add('A');
        queues.get(0).add('E');
        queues.get(1).add('B');
        queues.get(2).add('C');
        queues.get(3).add('D');
        for (int i = 0; i < n; i++) {
            queues.get((i + 1) % 4).add(queues.get(i % 4).poll());
        }
        StringBuilder sb = new StringBuilder();
        for (ArrayDeque<Character> q : queues) {
            while (q.size() > 0) {
                sb.append(q.poll());
            }
            sb.append("\n");
        }
        System.out.print(sb);
    }
}

class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public String next() throws Exception {
        if (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
}