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 C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;

namespace AtCoderAbc160
{
    internal class Program
    {
        public static void Main(string[] args)
        {
            var s = Console.ReadLine();

            var p = new Problem1();
            Console.WriteLine(p.GetAnswer(s));
        }
    }

    public class Problem1
    {
        public string GetAnswer(string s)
        {
            var same = s[2] == s[3] && s[4] == s[5];
            return same ? "Yes" : "No";
        }
    }
}