#include <bits/stdc++.h>
using namespace std;
const long long losn = 1e6 + 5;
const long long maxn = 1e5 + 5;
const long long minn = 1e3 + 5;
const long long tiny = 1e2 + 5;
const long long inf = 1e9;
const long long mod = 1e9 + 7;
const long long hmod = 4698571;
int main() {
  long long n;
  cin >> n;
  long long tot = 1;
  for (long long i = 1; i <= n; i++) {
    cout << char(tot + 'a' - 1);
    tot++;
    if (tot == 5) {
      tot = 1;
    }
  }
  return 0;
}
