A Hitachi string is a concatenation of one or more copies of the string `hi`.

For example, `hi` and `hihi` are Hitachi strings, while `ha` and `hii` are not.

Given a string S, determine whether S is a Hitachi string.

Constraints

* The length of S is between 1 and 10 (inclusive).
* S is a string consisting of lowercase English letters.

Input

Input is given from Standard Input in the following format:


S


Output

If S is a Hitachi string, print `Yes`; otherwise, print `No`.

Examples

Input

hihi


Output

Yes


Input

hi


Output

Yes


Input

ha


Output

No
import java.util.*;
     
class Main{
    public static void main(String[] args) {
        
        try(Scanner sc = new Scanner(System.in);
        
        ){
 
            String hitachi = sc.next();
            StringBuilder sb = new StringBuilder();
            int yesFlg = 0; 
            for(int i = 0; i < 5; i++){
                sb.append("hi");
                if(hitachi.equals(sb.toString())){
                    System.out.println("Yes");
                    yesFlg += 1; 
                }
            }
            if(yesFlg == 0){
                System.out.println("No");
            }
 
        }catch(Exception e){
            e.printStackTrace();
        }        
    }
}