#include<bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint=modint998244353;
using namespace std;
using ll=long long;
using ul=unsigned long long;
int dx[8] = {-1, 1, 0, 0, -1, -1, 1, 1};
int dy[8] = {0, 0, -1, 1, -1, 1, -1, 1};
using Graph=vector<vector<int>>;
int main(){
    string S="kyoprotenkei90";
    sort(S.begin(),S.end());
    string T;
    cin>>T;
    sort(T.begin(),T.end());
    cout<<(S==T?"Yes":"No")<<endl;
}