#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  long long i, z, y = 0, x, l = 0, A[1000], B[5004], a, b, s, j, m, n, num, p,
                  q, k, r;
  char ch[200000];
  l = 0;
  cin >> n;
  vector<long long> v;
  y = 0;
  z = 4;
  p = 97;
  while (z) {
    for (i = y; i < n; i += 4) ch[i] = char(p);
    p++;
    z--;
    y++;
  }
  ch[n] = '\0';
  cout << ch;
  return 0;
}
