#include<bits/stdc++.h>
using namespace std;
using ll = long long;

int main(){
    ll m;
    cin>>m;
    vector<char> ans;
    ll a = 10000;
    ll b = 10000;
    ll cnt = 0;
    ll now = 0;
    while(a>0||b>0){
        ll nxt = a * (a+1) / 2;
        while(a&&b&&cnt+nxt<=m){
            cnt += nxt;
            ans.push_back('n');
        }
        if(now==0){
            b--;
            ans.push_back('o');
        }else{
            a--;
            ans.push_back('c');
        }
        now ^= 1;
    }
    reverse(ans.begin(),ans.end());
    assert(cnt==m);
    for(int i = 0;i<ans.size();i++){
        cout<<ans[i];
    }
    cout<<endl;

}