#include <bits/stdc++.h>
using namespace std;
const int maxn = 100050;
int n, m;
char ch[maxn];
int main() {
  int i, j;
  while (scanf("%d", &n) != EOF) {
    for (i = 1; i <= 4; i++)
      for (j = i; j <= n; j += 4) ch[j] = 'a' + i - 1;
    for (i = 1; i <= n; i++) printf("%c", ch[i]);
    puts("");
  }
  return 0;
}
