import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;

public class Main {
  public static void main(String[] args) throws IOException {
    Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
    String s = in.next();
    if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
      System.out.println("Yes");
    } else System.out.println("No");
  }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io import java.util.Scanner; Scanner java.util public class Main {
  public static void main(String[] args) throws IOException {
    Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
    String s = in.next();
    if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
      System.out.println("Yes");
    } else System.out.println("No");
  }
} Main public static void main(String[] args) throws IOException {
    Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
    String s = in.next();
    if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
      System.out.println("Yes");
    } else System.out.println("No");
  } main {
    Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
    String s = in.next();
    if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
      System.out.println("Yes");
    } else System.out.println("No");
  } Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in))); in new Scanner(new BufferedReader(new InputStreamReader(System.in))) String s = in.next(); s in.next() in.next in if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
      System.out.println("Yes");
    } else System.out.println("No"); s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5) s.charAt(2) == s.charAt(3) s.charAt(2) s.charAt s 2 s.charAt(3) s.charAt s 3 s.charAt(4) == s.charAt(5) s.charAt(4) s.charAt s 4 s.charAt(5) s.charAt s 5 {
      System.out.println("Yes");
    } System.out.println("Yes") System.out.println System.out System System.out "Yes" System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main {
  public static void main(String[] args) throws IOException {
    Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
    String s = in.next();
    if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
      System.out.println("Yes");
    } else System.out.println("No");
  }
} public class Main {
  public static void main(String[] args) throws IOException {
    Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
    String s = in.next();
    if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
      System.out.println("Yes");
    } else System.out.println("No");
  }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;

public class Main {
  public static void main(String[] args) throws IOException {
    Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
    String s = in.next();
    if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
      System.out.println("Yes");
    } else System.out.println("No");
  }
}
