#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
//using namespace atcoder;
//using mint = modint1000000007;
//const int mod = 1000000007;
//using mint = modint998244353;
//const int mod = 998244353;
//const int INF = 1e9;
//const long long LINF = 1e18;
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rep2(i,l,r)for(int i=(l);i<(r);++i)
#define rrep(i, n) for (int i = (n-1); i >= 0; --i)
#define rrep2(i,l,r)for(int i=(r-1);i>=(l);--i)
#define all(x) (x).begin(),(x).end()
#define allR(x) (x).rbegin(),(x).rend()
#define endl "\n"
#define P pair<int,int>
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	long long m; cin >> m;
	if (0 == m) {
		cout << "yukicoder" << endl;
		return 0;
	}
	vector<long long>v;
	string s;
	rrep2(i, 1, 20001) {
		long long x = (long long)(i + 1)*i / 2;
		while (m >= x) {
			m -= x;
			s += 'n';
		}
		s += "oc";
	}
	reverse(all(s));
	while ('n' != s.back()) {
		s.pop_back();
	}
	cout << s << endl;
	return 0;
}