#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,m,n) for(int i=m; i<n; ++i)
#define repl(i,m,n) for(ll i=m; i<n; ++i)

int main(){
    string S;
    cin >> S;

    const string T = "kyoprotenkei90";
    vector<int> cntT(28, 0);
    for(char t : T){
        if(t == '0') cntT[26]++;
        else if(t == '9') cntT[27]++;
        else cntT[int(t - 'a')]++;
    }

    vector<int> cntS(28, 0);
    for(char s : S){
        if(s == '0') cntS[26]++;
        else if(s == '9') cntS[27]++;
        else cntS[int(s - 'a')]++;
    }

    rep(i, 0, 28){
        if(cntT[i] != cntS[i]){
            cout << "No" << endl;
            return 0;
        }
    }
    cout << "Yes" << endl;

    return 0;
}