import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution { 
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int q = in.nextInt();
        String s2 = "hackerrank";
        int a=0, b=0;
        
            for(int a0 = 0; a0 < q; a0++){
                String s = in.next();
                // your code goes here
              for(int i = 0; i < s.length(); i++) 
              {
                char c = s.charAt(i);
                if (s2.indexOf(c) == -1) 
                    {
                     b++;
                    }
                     else
                     a++;  

                  
            }
    if(a > b)
            System.out.println("YES");
         else
            System.out.println("NO");
             }


    }
}