#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i=a;i<b;i++)
using ll = long long;
#define all(p) p.begin(),p.end()

int main(){
	ll M;
	cin>>M;
	if(M<100){
		rep(i,0,M) cout<<'c';
		cout<<"on\n";
		return 0;
	}
	ll B=1;
	while(B*B*B+B*B+B+1<M) B++;
	B--;
	M-=B*B*B+B*B+B+1;
	cout<<"con";
	string S="con";
	for(int roop=2;roop>=0;roop--){
		if(roop){
			rep(i,0,M%B) cout<<S[roop];
			M/=B;
		}else{
			rep(i,0,M) cout<<S[roop];
		}
	}
	rep(i,0,3) rep(j,0,B) cout<<S[i];
	cout<<endl;
}