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.*;
public class Main { 
	final static int maxn=(int)2e5+10;
	static int vis[]=new int [maxn];
	static int a[]=new int [maxn];
	static int b[]=new int [maxn];
	static int f[][]=new int [maxn][3];
 public static void main(String args[])
 {
	 Scanner input=new Scanner(System.in);
     String s=input.next();
     if(s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5))
    	 System.out.println("Yes");
     else
    	 System.out.println("No");
}
}