#include <bits/stdc++.h>
using namespace std;
char s[100005];
int main() {
  int n;
  cin >> n;
  int k = min(n, 4);
  for (int i = 0; i < k; i++)
    for (int j = i; j < n; j += 4) s[j] = i + 'a';
  s[n] = '\0';
  cout << s << endl;
  return 0;
}
