#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
#define Inf 1000000001


int main(){
	
	string s[4] = {"AE","B","C","D"};
	
	int k;
	cin>>k;
	
	rep(i,k){
		int x = i;
		int y = (i+1)%4;
		s[y] += s[x][0];
		s[x].erase(s[x].begin());
	}
	
	rep(i,4)cout<<s[i]<<endl;
		
	return 0;
}