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 S;
	cin>>S;
	int hi=0;
	int z=S.size();
	for(int i=0;i<z;i+=2)
	{
		if(S.substr(i,2)=="hi")
		hi++;
	}	
	if(hi*2==z)
	cout<<"Yes"<<endl;
	else
	cout<<"No"<<endl;
	return 0;
}