#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, m, c;
  cin >> n;
  char ch = 'a';
  char a[100007];
  if (n <= 4) {
    for (int i = 1; i <= n; i++) {
      a[i] = ch;
      ch += 1;
    }
    for (int j = 1; j <= n; j++) {
      cout << a[j];
    }
    cout << endl;
    return 0;
  } else if (n > 4) {
    m = 1;
    for (int i = 1; i <= 4; i++) {
      c = m;
      while (!(c > n)) {
        a[c] = ch;
        c += 4;
      }
      m++;
      ch++;
    }
  }
  for (int j = 1; j <= n; j++) {
    cout << a[j];
  }
  cout << endl;
}
