Problem:
Score : 100 points

Problem Statement

A string of length 6 consisting of lowercase English letters is said to be coffee-like if and only if its 3-rd and 4-th characters are equal and its 5-th and 6-th characters are also equal.

Given a string S, determine whether it is coffee-like.

Constraints

S is a string of length 6 consisting of lowercase English letters.

Input

Input is given from Standard Input in the following format:

S

Output

If S is coffee-like, print Yes; otherwise, print No.

Sample Input 1

sippuu

Sample Output 1

Yes

In sippuu, the 3-rd and 4-th characters are equal, and the 5-th and 6-th characters are also equal.

Sample Input 2

iphone

Sample Output 2

No

Sample Input 3

coffee

Sample Output 3

Yes

Solution in C (Clang 3.8.0) (judge verdict: Runtime Error)

#include<stdio.h>

int main()
{
	char *str;
	char j;
	scanf("%s", &j);
	str = &j;
	if (*(str + 2) == *(str + 3) && *(str + 4) == *(str + 5))
		printf("Yes");
	else
		printf("No");
	return 0;
}