#include <iostream>
#include <string>
using namespace std;

int main(){
	int n;
	cin >> n;

	string s, t = "ab";
	for(int z = 0; z < 2; ++z){
		if(n > 0){
			s += t[1];
			int p = n - 1;
			for(int i = 2; i * i <= n; ++i){
				s += t;
				p = n - i * i;
			}
			n = p;
		}
		t = "cd";
	}

	for(int i = 0; i < n; ++i){
		s += "sugim"[i % 5];
	}
	
	cout << s << '\n';
}