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.*;

public class Main{
    public static void main(String args[]){
        Scanner sn = new Scanner(System.in);
        String S = sn.next();
        String s = "";
        int flag = 0;
        for(int i=0; i<S.length()/2; i++){
            s += "hi";
            if(s.equals(S)) {
                flag++;
                System.out.println("Yes");
                break;
            }
        }
        if(flag == 0) System.out.println("No");
        
    }
}