#include<iostream>
#include<queue>
#define rep(i,n) for(i=0;i<(int)(n);i++)
using namespace std;
typedef long long ll;
typedef unsigned long long ull;

int k;

int main(){
    int i;
    vector<queue<char> > ques(4);
    scanf("%d",&k);
    ques[0].push('A');ques[0].push('E');
    ques[1].push('B');
    ques[2].push('C');
    ques[3].push('D');
    rep(i,k){
        ques[(i+1)%4].push(ques[i%4].front());
        ques[i%4].pop();
    }
    rep(i,4){
        while(ques[i].size()){
            putchar(ques[i].front());
            ques[i].pop();
        }
        putchar('\n');
    }
    return 0;
}