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.io.*;
import java.util.*;

public class Main{
    public static void main(String[] args)throws Exception{
        Scanner sc=new Scanner(System.in);
        String s=sc.next();
        int l=s.length();
        boolean flag=(l%2==0);
        for(int i=1;i<l;i+=2){
            if(!s.substring(i-1,i+1).equals("hi"))flag=false;
        }
        if(flag){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
}