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 (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>

int main()
{
	char	S[6];
	scanf("%s",&S);
	if (S[0] != S[2] && S[0] != S[4] && S[0] != S[3] &&  S[0] != S[5] && S[0] != S[1])
	{
		if (S[1] != S[2] && S[1] != S[4] && S[1] != S[3] && S[1] != S[5])
		{
			if (S[2] == S[3] && S[4] == S[5])
			{
				printf("Yes");
				return 0;
			}
		}
	}
	printf("No");
	return 0;
}