#include <bits/stdc++.h> 

using i64 = long long; 
using u64 = unsigned long long; 
using u32 = unsigned; 

using u128 = unsigned __int128; 
using i128 = __int128; 

void solve() {
	int N; std::cin >> N;
	if(N == 1)  {
		std::cout << "aru";
		return;
	}	
	
	std::vector<int> b;
	while(N > 0) {
		b.push_back(N % 2);
		N /= 2;
	}
	std::reverse(b.begin(), b.end());

	std::string ans = "a", aux = "arud";

	for(int i = 1, j = 0; i < (int)b.size(); i ++) {
		ans = aux[j] + ans + aux[j];
		if(b[i]) {
			j++; j %= 4;
			ans = aux[j] + ans + aux[j];
		}
	}

	std::cout << ans;
} 

int main() { 
	std::ios::sync_with_stdio(false); 
	std::cin.tie(nullptr); 

	int T = 1; 
	//std::cin >> T; 

	while (T--) { 
		solve(); 
	} 
	return 0; 
}