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)

#include <bits/stdc++.h>
 
#define f(i,a,b) for( ll i = a; i < (ll) b ; i++ ) 
#define af(i,a,b) for( ll i = a; i >= (ll) b ; i--)
#define rep(i,a,b,k) for(ll i = a; i < b ; i+= k )
#define arep(i,a,b,k) for( ll i = a; i >= b ; i-= k)
#define fs first
#define sc second
#define pb push_back
#define mp make_pair
#define sz(a) (ll) a.size()
#define all(a) a.begin(), a.end()
#define sor(a) sort( a.begin(), a.end() )
#define fastio ios_base::sync_with_stdio(false);cin.tie(NULL)
#define inter ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr)
using namespace std;
 
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> ii ;
typedef vector<ll>  vi ;
typedef vector<ii> vii ;
 
const ll MAX= 3e3+100;


int main(){
	fastio;
	string s;
	cin>>s;
	if(s[2]==s[3] && s[4]==s[5]) cout<<"Yes\n";
	else cout<<"No\n";	
  	return 0;	
}