#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

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; }

const int INF = (1<<30)-1;
const int MOD = 1e9+7;
const ll LINF = (1ll<<62)-1;

#define REP(i,n) for(int i=0;i<(n);++i)
#define COUT(x) cout<<(x)<<"\n"
#define COUT16(x) cout << fixed << setprecision(16) << (x) << "\n";

int main(){
    //input
    string s;cin >> s;
    string t = "kyoprotenkei90";
    //calc
    sort(s.begin(),s.end());
    sort(t.begin(),t.end());
    //output
    if(s==t)COUT("Yes");
    else COUT("No");
}