Problem:
Score : 100 points

Problem Statement

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.

Sample Input 1

hihi

Sample Output 1

Yes

hihi is the concatenation of two copies of hi, so it is a Hitachi string.

Sample Input 2

hi

Sample Output 2

Yes

Sample Input 3

ha

Sample Output 3

No

Solution in Go (1.14.1) (judge verdict: Accepted)

package main

import "fmt"

func main() {
	// Code for A - Hitachi String
	var S string
	fmt.Scanf("%s", &S)

	if len(S)%2 != 0 {
		fmt.Println("No")
	} else {
		var ans string
		for i := 0; i < len(S); i++ {
			if i%2 == 0 {
				ans += "h"
			} else {
				ans += "i"
			}
		}

		if S == ans {
			fmt.Println("Yes")
		} else {
			fmt.Println("No")
		}
	}
}