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 Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.Scanner;

public class Main {

	private static final String STR_YES = "Yes";
	private static final String STR_NO = "No";

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String str = sc.next();

		sc.close();

		char s3 = str.charAt(2);
		char s4 = str.charAt(3);
		char s5 = str.charAt(4);
		char s6 = str.charAt(5);

		if (s3 == s4 && s5 == s6) {
			System.out.print(STR_YES);
		} else {
			System.out.print(STR_NO);
		}

	}
}