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<iostream>
using namespace std;
int main(){
	string s;
	cin>>s;
	if(s.size()%2==1){
		cout<<"No";
		return 0;
	}
	for(int i=0;i<s.size();i+=2)
		if(s[i]!='h'||s[i+1]!='i'){
			cout<<"No";
			return 0;
		}
	cout<<"Yes";
	return 0;
}