Codeforces - 110B

#include <bits/stdc++.h>
using namespace std;
 
int main()
{
    int n , value ;
    char letter[] = {'a','b','c','d'};
    cin >> n;
    for (int i = 0 ; i < n ; i++){
        value = i % 4;
        cout << letter[value];
    }
    return 0;
}