#include <bits/stdc++.h>
using namespace std;
int main(){
    string str = "kyoprotenkei90";
    int cnt = 14;
    string s;
    cin >> s;
    map<char, int> ans, res;
    for(int i = 0; i < 14; i++){
    	ans[str[i]]++;
    	res[s[i]]++;
    }
    if(ans.size() != res.size()){
    	cout << "No" << endl;
    	return 0;
    }
    auto itr = res.begin();
    for(auto val : ans){
    	if(val.first != itr->first || (val.first == itr->first && val.second != itr->second)){
    		cout << "No" << endl;
    		return 0;
    	}
    	itr++;
    }
    cout << "Yes" << endl;
}