#include <bits/stdc++.h>
//#include <atcoder/modint>
using namespace std;
//using namespace atcoder;
//using mint = modint1000000007;
typedef long long ll;
#define FOR(I,A,B) for(ll I = ll(A); I < ll(B); ++I)
ll keta_(ll a){ll r=0;while(a){a/=10;r++;}return r;}



int main(){
	string s,t = "kyoprotenkei90";
	cin >> s;

	sort(s.begin(), s.end());
	sort(t.begin(), t.end());

	if(s==t){
		cout << "Yes" << endl;
	}else{
		cout << "No" << endl;
	}

}