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 Java7 (OpenJDK 1.7.0) (judge verdict: Wrong Answer)

import java.util.*;
import java.io.*;

public class Main {

	static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

	public static int nextInt() throws IOException {
		return Integer.parseInt(br.readLine());
	}

	public static int[] nextArr() throws IOException {
		String elements[] = br.readLine().split(" ");
		int arr[] = new int[elements.length];
		for (int j = 0; j < elements.length; j++)
			arr[j] = Integer.parseInt(elements[j]);
		return arr;
	}

	public static void printArr(int arr[]) {
		for (int i = 0; i < arr.length; i++)
			System.out.print(arr);
	}

	public static String next() throws IOException {
		return br.readLine();
	}

	public static void main(String[] args) throws IOException {

		
			String line = next();
			if (line.charAt(2) == line.charAt(3) && line.charAt(4) == line.charAt(4))
				System.out.println("Yes");
			else
				System.out.println("No");

		
	}

}