#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  if (n == 3) cout << "aaa" << endl;
  cout << "aab" << endl;
  cout << "aab" << endl;
  cout << "abb" << endl;
  cout << "abc" << endl;
  return 0;
}
