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.io.*;
import java.lang.*;
import java.util.Scanner;
public class Main
{
  public static void main(String args[])throws Exception
  {
   //String s; 
    int c=0;
	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String s = br.readLine();  
    for(int i=0;i<6;i++)
    {
      if(s.charAt(i)>=97 && s.charAt(i)<=122)
      {
        c=c+1;
      }
    }
    if(s.length()==6 && c==s.length())
    {
    	if((s.charAt(2)==s.charAt(3)) &&(s.charAt(4)==s.charAt(5)))
       		{
         		System.out.println("Yes");
       		}
       
    }
    else
       {
         System.out.println("No");
       }
   }
}