import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception{
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String target = "kyoprotenkei90";

        char[] charInInput = new char[s.length()], charInTarget = new char[target.length()];
        for(int i=0; i<s.length(); i++) charInInput[i] = s.charAt(i);
        for(int i=0; i<target.length(); i++) charInTarget[i] = target.charAt(i);

        //「一方を並べ替えて他方にできるか?」⇔「両方をソートして一致するか?」
        Arrays.sort(charInInput);
        Arrays.sort(charInTarget);
        if(Arrays.equals(charInInput, charInTarget)) System.out.println("Yes");
        else System.out.println("No");
    }
}