#include <algorithm>
#include <iostream>
#include <string>

int main() {
    std::string target = "kyoprotenkei90";
    std::string input;
    std::cin >> input;
    
    std::sort(std::begin(target), std::end(target));
    std::sort(std::begin(input), std::end(input));
    
    std::cout << ((input == target) ? "Yes\n" : "No\n");
}