#include <iostream>
#include <algorithm>
#include <iomanip>
#include <vector>
#include <queue>
#include <set>
#include <map>
#include <tuple>
#include <cmath>
#include <numeric>
#include <functional>
#include <cassert>

#define debug_value(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << #x << "=" << x << endl;
#define debug(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << x << endl;

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

using namespace std;
typedef long long ll;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << setprecision(10) << fixed;
    string target = "kyoprotenkei90";
    map<char, int> cnt;
    for(char c: target) {
        if(cnt.count(c)) cnt[c]++;
        else cnt[c] = 1;
    }
    string s; cin >> s;
    map<char, int> cnt1;
    for(char c: s) {
        if(cnt1.count(c)) cnt1[c]++;
        else cnt1[c] = 1;
    }
    for(auto [c, x]: cnt1){
        if(cnt.count(c) == 0){
            cout << "No" << endl;
            return 0;
        }
        if(cnt[c] != x){
            cout << "No" << endl;
            return 0;
        }
    }
    cout << "Yes" << endl;
}