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 <stdio.h>

char st[20];

int main(){
    scanf("%s",st);
    for(int i=0;st[i];i+=2){
        if (st[i]=='h' && st[i+1]=='i') continue;
        printf("No");return 0;
    }
    printf("Yes");

}
