#include <algorithm>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <vector>
using namespace std;
using ll = long long;
#define rep(i, j, n) for (ll i = j; i < (n); ++i)
#define rrep(i, j, n) for (ll i = (n) - 1; j <= i; --i)
#define all(a) a.begin(), a.end()
template <typename T>
std::ostream &operator<<(std::ostream &os, std::vector<T> &a) {
  for (size_t i = 0; i < a.size(); ++i) os << (i > 0 ? " " : "") << a[i];
  return os << '\n';
}
template <typename T>
std::istream &operator>>(std::istream &is, std::vector<T> &a) {
  for (T &x : a) { is >> x; }
  return is;
}

//[[maybe_unused]] constexpr long long MOD = 998244353;
// constexpr long long MOD = 1000000007;
[[maybe_unused]] constexpr int INF = 0x3f3f3f3f;
[[maybe_unused]] constexpr long long INFL = 0x3f3f3f3f3f3f3f3fLL;

int main() {
  cin.tie(0)->sync_with_stdio(0);
  //
  ll a, b;
  cin >> a >> b;

  string s;
  char c = 0;
  rep(i, 0, b * 10) {
    s += c + 'a';
    c = (c + 3) % 26;
  }
  int n = (int)s.size();
  vector<ll> hash(n + 1);
  rep(i, 0, n) { hash[i + 1] = (hash[i] * a + s[i]) % b; }
  vector<ll> mp(b);
  rep(i, 0, n) mp[hash[i]]++;
  ll mx = 0, mxi = 0;
  rep(i, 0, b) if (mx < mp[i]) mx = mp[i], mxi = i;

  vector<int> ids;
  rep(i, 0, n) if (hash[i] == mxi) ids.push_back(i);
  int id1 = ids[0], id2 = ids[1], id3 = ids[2], id4 = ids[3];
  if (id2 - id1 == id4 - id3) id4 = ids[4];
  string t = s.substr(0, id1) + s.substr(id3, id4 - id3) +
             s.substr(id2, id3 - id2) + s.substr(id1, id2 - id1) +
             s.substr(id4, n - id4);
  cout << s << '\n' << t << '\n';
}