import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author Akash
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ACoffee solver = new ACoffee();
        solver.solve(1, in, out);
        out.close();
    }

    static class ACoffee {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            String s = in.nextLine();
            boolean result = s.charAt(3) == s.charAt(2) && s.charAt(5) == s.charAt(4);
            out.println(result ? "Yes" : "No");
        }

    }
}
 import java.io.OutputStream; OutputStream java.io import java.io.IOException; IOException java.io import java.io.InputStream; InputStream java.io import java.io.PrintWriter; PrintWriter java.io import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ACoffee solver = new ACoffee();
        solver.solve(1, in, out);
        out.close();
    }

    static class ACoffee {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            String s = in.nextLine();
            boolean result = s.charAt(3) == s.charAt(2) && s.charAt(5) == s.charAt(4);
            out.println(result ? "Yes" : "No");
        }

    }
} Main public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ACoffee solver = new ACoffee();
        solver.solve(1, in, out);
        out.close();
    } main {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ACoffee solver = new ACoffee();
        solver.solve(1, in, out);
        out.close();
    } InputStream inputStream = System.in; inputStream System.in System System.in OutputStream outputStream = System.out; outputStream System.out System System.out Scanner in = new Scanner(inputStream); in new Scanner(inputStream) PrintWriter out = new PrintWriter(outputStream); out new PrintWriter(outputStream) ACoffee solver = new ACoffee(); solver new ACoffee() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class ACoffee {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            String s = in.nextLine();
            boolean result = s.charAt(3) == s.charAt(2) && s.charAt(5) == s.charAt(4);
            out.println(result ? "Yes" : "No");
        }

    } ACoffee public void solve(int testNumber, Scanner in, PrintWriter out) {
            String s = in.nextLine();
            boolean result = s.charAt(3) == s.charAt(2) && s.charAt(5) == s.charAt(4);
            out.println(result ? "Yes" : "No");
        } solve {
            String s = in.nextLine();
            boolean result = s.charAt(3) == s.charAt(2) && s.charAt(5) == s.charAt(4);
            out.println(result ? "Yes" : "No");
        } String s = in.nextLine(); s in.nextLine() in.nextLine in boolean result = s.charAt(3) == s.charAt(2) && s.charAt(5) == s.charAt(4); result s.charAt(3) == s.charAt(2) && s.charAt(5) == s.charAt(4) s.charAt(3) == s.charAt(2) s.charAt(3) s.charAt s 3 s.charAt(2) s.charAt s 2 s.charAt(5) == s.charAt(4) s.charAt(5) s.charAt s 5 s.charAt(4) s.charAt s 4 out.println(result ? "Yes" : "No") out.println out result ? "Yes" : "No" result "Yes" "No" int testNumber testNumber Scanner in in PrintWriter out out public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ACoffee solver = new ACoffee();
        solver.solve(1, in, out);
        out.close();
    }

    static class ACoffee {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            String s = in.nextLine();
            boolean result = s.charAt(3) == s.charAt(2) && s.charAt(5) == s.charAt(4);
            out.println(result ? "Yes" : "No");
        }

    }
} public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ACoffee solver = new ACoffee();
        solver.solve(1, in, out);
        out.close();
    }

    static class ACoffee {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            String s = in.nextLine();
            boolean result = s.charAt(3) == s.charAt(2) && s.charAt(5) == s.charAt(4);
            out.println(result ? "Yes" : "No");
        }

    }
} Main
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author Akash
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ACoffee solver = new ACoffee();
        solver.solve(1, in, out);
        out.close();
    }

    static class ACoffee {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            String s = in.nextLine();
            boolean result = s.charAt(3) == s.charAt(2) && s.charAt(5) == s.charAt(4);
            out.println(result ? "Yes" : "No");
        }

    }
}

