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
#include<bits/stdc++.h>
using namespace std;
int main(){
	string a;
	cin>>a;
	bool flag = true;
	for(int i = 0; i < a.length(); i++){
		if(a[i] == 'h' && a[i + 1] == 'i') {
			i += 1;
		}else flag = false;
	}
	if(flag) cout<<"Yes";
	else cout<<"No";
	return 0;
} 