#include <bits/stdc++.h>
#define rep(i, l, r) for (int i = (l); i < (r); i++)
using namespace std;

typedef long long ll;

int main() {
    int K;
    cin >> K;
    vector<string> q = {"AE", "B", "C", "D"};
    rep(i, 0, K) {
        char c = q[i % 4][0];
        q[i % 4] = q[i % 4].substr(1,1);
        q[(i + 1) % 4].push_back(c);
    }
    rep(i, 0, 4) cout << q[i] << endl;
}