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: Runtime Error)

import java.util.Scanner;
public class Main {
	public static void main(String args[]) {
 	  	Scanner scanInputs =  new Scanner(System.in);

      while(scanInputs.hasNext()) {
        	String checkStr = String.valueOf(scanInputs.next());
        	if(checkStr.length() == 6) {
              String strInput = String.valueOf(scanInputs.next()).substring(2);
              String firstStr = strInput.substring(0, 1);
              String nextStr = strInput.substring(1, 1);
              if(firstStr.equals(nextStr)) {
                firstStr = strInput.substring(2, 1);
                nextStr = strInput.substring(3, 1);
	              if(firstStr.equals(nextStr)) {
                  	System.out.println("Yes");
                  } else {
                  	System.out.println("No");
                  }
              } else {
                  	System.out.println("No");
              }
            }
		}
    }
}