#include <bits/stdc++.h>
using namespace std;
int caseno = 1;
typedef long long LL;
typedef unsigned long long ULL;
typedef long long int64;
typedef unsigned long long uint64;
const double PI = 2 * acos(0.0);
const double EPS = 1e-11;
const int SIZE = 1e6;
char ch = 'a';
string S;
int main() {
  std::ios_base::sync_with_stdio(0);
  int tcases, I, J, K, N, n, m, cnt = 0, len;
  cin >> n;
  S = "";
  for (I = 1; I <= n; I++) {
    S += ch;
    ch++;
    if (I != 1 && (I % 4 == 0)) ch = 'a';
  }
  cout << S << '\n';
  return 0;
}
