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 rep(i, l, r) for(register int i = l; i < r; i++)
#define tms(x) ___ = x; while(___--)
#define D(x) cout<<"D: "<<#x<<'='<<x<<endl;
#define R(x, l) cout<<"R: Array "<<#x<<endl; rep(i, 0, l) cout<<' '<<i<<':'<<*(x+i)<<endl;
#define pb push_back
#define int ll
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
int ___;
template<typename tn> inline tn next(void);
template<typename tn> inline ostream& operator << (ostream& os, const vector<tn>& v);
signed main(void)
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	string str = next<string>();
	if (str[2] == str[3] && str[4] == str[5]) puts("Yes");
	else puts("No");
	return ~~(0-0);
}
template<typename tn> inline tn next(void)
{
	tn k;
	cin>>k;
	return k;
}
template<typename tn> inline ostream& operator << (ostream& os, const vector<tn>& v)
{
	rep(i, 0, v.size()) os<<v[i]<<' ';
	return os;
}