#include <algorithm>
#include <iostream>
#include <numeric>
#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()

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 + 1) % 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);
  string t = s;
  reverse(t.begin() + ids[0], t.begin() + ids[1]);
  cout << s << '\n' << t << '\n';
}