#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
#define pf push_front
#define all(x) x.begin(), x.end()
#define int long long
using namespace std;
typedef pair< int, int > P;
typedef long long ll;
const int N = 2e5+99, M = 2e5+9, INF = 1.1e18, mod = 1000000007;
const double PI = acos( -1 ), ret = PI / 180.0;
//チルノ最強！

signed main( void ) {
    ios::sync_with_stdio( false );
    string s;
    cin >> s;
    cout << ( s[2] == s[3] && s[4] == s[5] ? "Yes" : "No" ) << '\n';
    return 0;
}


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