#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0;i<n;i++)
using namespace std;
int main() {
    int k ; cin >> k;
    vector<deque<char>> q(4);
    q[0] = {'A', 'E'};
    q[1] = {'B'};
    q[2] = {'C'};
    q[3] = {'D'};
    rep(i, k){
        char c = q[i%4].front();
        q[i%4].pop_front();
        q[(i+1)%4].push_back(c);
    }
    rep(i,q.size()){
        for (char c: q[i]) cout << c;
        cout  << endl;
    }
    return 0;
}