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

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

	if(n==1){
		cout << "unk" << endl;
		return 0;
	}

	vector<int> b;
	for(int m=n; m>0; ){
		b.push_back( m%2 );
		m /= 2;
	}
	reverse( begin(b), end(b) );

	string ans = "h";
	string alp = "hoge";
	
	for(int i=1, k=0; i<b.size(); i++){
		ans = alp[k] + ans + alp[k];
		if( b[i] ){
			k = (k+1)%4;
			ans = alp[k] + ans + alp[k];
		}
	}

	cout << ans << endl;

	return 0;
}