#include <bits/stdc++.h>
using namespace std;
long long n, t, m, sum, x, y, mx, mn, avg;
map<long long, long long> mp;
int cum[100002];
bool isPrime(int x) {
  for (int i = 2; i * i <= x; i++)
    if (x % i == 0) return false;
  return true;
}
int main(void) {
  ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  ;
  cin >> n;
  cout << "aaa" << endl << "aba" << endl << "abc";
}
