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

int main(){
    string A = "kyoprotenkei90";
    string S;cin>>S;
    sort(A.begin(),A.end());
    sort(S.begin(),S.end());
    if(A==S){
        cout<<"Yes"<<endl;
    }else{
        cout<<"No"<<endl;
    }
}