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

int main(){
  
  string s; cin>>s;
  string t = "kyoprotenkei90";
  sort(s.begin(),s.end());
  sort(t.begin(),t.end());
  cout<<(s==t?"Yes":"No")<<'\n';
  
  
}