#include <bits/stdc++.h>
// #include <atcoder/maxflow>
#define int long long
using namespace std;
// using namespace atcoder;
using vec_int = vector<int>;
using ll = long long;
#define rep(i, n) for(int i = 0; i < (int)(n); i++)

void cout_line(vector<int> &a){
    for(int i=0;i<a.size();i++){
        if(i<a.size()-1){
            cout<<a.at(i)<<" ";
        }else{
            cout<<a.at(i)<<endl;
        }
    }
}


signed main()
{
    string S; cin>>S;
    string S2 = "kyoprotenkei90";
    if(S.size()!=S2.size()){
        cout<<"No"<<endl;
        return 0;
    }

    map<char, int> map1;
    map<char, int> map2;
    for(int i=0;i<S.size();i++){
        map1[S.at(i)]++;
        map2[S2.at(i)]++;
    }

    for(auto temp: map1){
        if(!map2.count(temp.first)){
            cout<<"No"<<endl;
            return 0;
        }
        if(map2[temp.first]!=temp.second){
            cout<<"No"<<endl;
            return 0;

        }
    }
    cout<<"Yes"<<endl;



    return 0;
}