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>
using namespace std;
#define IOS ios_base::sync_with_stdio(false);cin.tie(NULL);
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define ff first
#define ss second
#define debug(x) cerr<<#x<<" "<<x<<endl;
#define f(i,n) for(ll i=0; i<n; i++)
#define f1(i,n) for(ll i=1; i<=n; i++)
#define fr(i,n) for(ll i=n-1; i>=0; i--)
#define f1r(i,n) for(ll i=n; i>0; i--)
#define mst(arr,val) memset(arr,val,sizeof(arr))
#define all(x) x.begin(),x.end()

typedef long long int ll;
typedef pair<ll,ll> pii;
ll M=1e9+7;
ll M2=998244353;
void show(vector<ll> v)
{
    for(ll i=0; i<v.size(); i++)
        cout<<v[i]<<" ";
    cout<<"\n";
}
void showrev(vector<ll> v)
{
    for(ll i=0; i<v.size(); i++)
        cout<<v[v.size()-i-1]<<" ";
    cout<<"\n";
}
void showarr(ll arr[],ll n)
{
    for(ll i=0; i<n; i++)
        cout<<arr[i]<<" ";
    cout<<"\n";
}
void showpv(vector<pair<ll,ll> > v)
{
    f(i,v.size())
        cout<<"("<<v[i].ff<<","<<v[i].ss<<")"<<" ";
    cout<<"\n";
}
int main()
{
    IOS
    ll T = 1,Q=1;
    //cin>>T;
    while(T--)
    {
        string str; cin>>str;
        if(str[2] == str[3] and str[4] == str[5])
            cout<<"Yes\n";
        else cout<<"No\n";
    }
    return 0;
}