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: Accepted)

import java.util.Scanner;
public class Main
{
    public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    int n =s.length();
    char s1 =s.charAt(2);
    char s2 =s.charAt(3);
    char s3 =s.charAt(4);
    char s4 =s.charAt(5);
    if(n==6&&s1==s2&&s3==s4){
        System.out.println("Yes");
    }else{
        System.out.println("No");
    }
}
}