#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
  int n;
  cin >> n;
  char data[n];
  char ch = 'a';
  for (int i = 0; i < 4; i++, ch++) {
    for (int j = i; j < n; j += 4) data[j] = ch;
  }
  for (int j = 0; j < n; j++) cout << data[j];
  cout << '\n';
  return 0;
}
