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.*;
 
public class Main{
   public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);  
      /*
      int n      = sc.nextInt();        // read input as integer
      long k     = sc.nextLong();       // read input as long
      double d   = sc.nextDouble();     // read input as double
      String str = sc.next();           // read input as String
      String s   = sc.nextLine();       // read whole line as String
      */
     String s= sc.next();
     char terceraLetra= s.charAt(3);
     char cuartaLetra= s.charAt(4);
     char quintaLetra= s.charAt(5);
     char sextaLetra= s.charAt(6);
     if(terceraLetra==(cuartaLetra) && quintaLetra==(sextaLetra))
     {
     	System.out.print("Yes");
     }else{
       		System.out.print("No");
         }
    }
}