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(void){
    string a;
    cin>>a;
    if(a=="hi"||a=="hihi"||a=="hihihi"||a=="hihihihi"||a=="hihihihihi")cout<<"Yes"<<endl;
    else cout<<"No"<<endl;
    
}
