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: Wrong Answer)

import java.util.*;

public class Main {

	
	// test #A
//	public static void main(String args[]) {
//		System.out.println("staring #1");
//		Scanner sc = new Scanner(System.in);
//		
//		int a = sc.nextInt();
//		
//		int b = sc.nextInt();
//		int c = sc.nextInt();
//		String s = sc.next();
//		
//		System.out.println(a+b+c+" "+s);
//		sc.close();
//	}

	// test #1  0322
	public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);
		
		String input = sc.next();		
		
		char array[] = input.toCharArray();
		
		boolean like = false;
		
		if ( (array[2] == array[3]) && (array[4]==array[5] ) )
			like = true;
		
		
		log( like ? "yes" : "no" );
		sc.close();
	}

	static void log(String s) {
		System.out.println(s);
	}

	static void log(int i) {
		System.out.println(i);
	}
	
}