#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 4000000000000000001

long long get(string s){
	long long a = 0,b = 0,c = 0;
	rep(i,s.size()){
		if(s[i]=='c')a++;
		else if(s[i]=='o')b += a;
		else c += b;
	}
	return c;
}

int main(){
	
	string s = "co";
	rep(i,10000)s += 'c';
	rep(i,10000)s += 'o';
	
	long long M;
	cin>>M;
	
	vector<long long> pos(s.size()+1,0);
	long long x = 0,y = 0;
	rep(i,s.size()){
		if(s[i]=='c')x++;
		else{
			y += x;
		}
		pos[i+1] = y;
	}
//	cout<<pos[2]<<endl;
	//cout<<x<<','<<y<<endl;
	vector<int> cnt(s.size()+1,0);
	for(int i=s.size();i>=0;i--){
		//cout<<M<<endl;
		while(M!=0 && M>=pos[i]){
			cnt[i]++;
			M -= pos[i];
		}
	}
	//cout<<M<<endl;
	string ans = "";
	rep(i,s.size()){
		ans += s[i];
		rep(j,cnt[i+1])ans += 'n';
	}
	
	cout<<ans<<endl;
	//cout<<get(ans)<<endl;
	//cout<<ans.size()<<endl;
	return 0;
}