import java.util.*;

public class Main {
    
    public static void main(String[] args) {
        
        Scanner sc = new Scanner(System.in);
        int K = sc.nextInt();
        String[] q = {"AE","B","C","D"};
        for( int i = 0; i < K; i++ ) {
            String h = q[i%4].substring(0,1);
            String t = q[i%4].substring(1,2);
            q[i%4] = t;
            q[(i+1)%4] += h;
        }
        
        for( String s : q ) {
            System.out.println(s);
        }
        
    }
    
}