#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  ll x, y;
  cin >> x >> y;
  map<ull, string> mp;
  for (int a = 'a'; a <= 'z'; ++a) {
    for (int b = 'a'; b <= 'z'; ++b) {
      for (int c = 'a'; c <= 'z'; ++c) {
        for (int d = 'a'; d <= 'z'; ++d) {
          string s = { char(a), char(b), char(c), char(d) };
          ull hash = (a + x * b + x * x * c + x * x * x * d) % y;
          if (mp.contains(hash)) {
            cout << s << '\n'
                 << mp[hash] << '\n';
            return 0;
          }
          mp[hash] = s;
        }
      }
    }
  }
  assert(false);
  return 0;
}