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;
char str[20];
int main()
{
	cin>>str;
	bool flag=false;
	for(int i=0;i<strlen(str);i+=2)
	{
		if(str[i]=='h'&&str[i+1]=='i')
			flag=true;
		else
			flag=false;
	}
	if(flag)
		puts("Yes");
	else
		puts("No");
	return 0;
}
