#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int count = n / 4;
  int mod = n % 4;
  int num = 97;
  char s[n];
  for (int i = 0; i < n; i++) s[i] = '1';
  for (int i = 0; i < n; i++) {
    if (i + 4 < n && s[i] == '1') {
      s[i] = num;
      s[i + 4] = num;
      num++;
    } else if (s[i] == '1') {
      s[i] = num;
      num++;
    }
    if (num > 100) {
      num = 97;
    }
  }
  for (int i = 0; i < n; i++) cout << s[i];
}
