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++14 (GCC 5.4.1) (judge verdict: Accepted)

/**************************
*                         *
*  Nothing Is Impossible  *
*                         *
**************************/
#include <algorithm>
#include <pthread.h>
#include <iostream>
#include <fstream>
#include <ctype.h>
#include <string>
#include <vector>
#include <thread>
#include <math.h>
#include <queue>
#include <stack>
#include <tuple>
#include <cmath>
#include <set>
#include <map>
#define GetRand(Min, Max) ((rand()%(int)(((Max) + 1)-(Min))) + (Min))
#define Rep(i, min, max) for(int i = min; i < max; ++i)
#define PB push_back
#define MP make_pair
typedef long long ll;
typedef long double ld;
using namespace std;

void Solve(){
	string s;	cin >> s;
	if(s[2] == s[3] && s[4] == s[5]){
		cout << "Yes" << endl;
	}else{
		cout << "No" << endl;
	}
}

int main(){
	ios::sync_with_stdio(NULL);
	cin.tie(NULL); cout.tie(NULL);
	Solve();
	return 0;
}