#include <bits/stdc++.h>
using namespace std;
int main() {
  vector<char> vec(100001);
  vec[0] = 'a';
  int i = 1;
  while (i < 100001) {
    if (vec[i - 1] == 'a')
      vec[i] = 'b';
    else if (vec[i - 1] == 'b')
      vec[i] = 'c';
    else if (vec[i - 1] == 'c')
      vec[i] = 'd';
    else if (vec[i - 1] == 'd')
      vec[i] = 'a';
    i++;
  }
  int n;
  cin >> n;
  for (int i = 0; i < n; i++) cout << vec[i];
  cout << endl;
}
