import java.util.*;

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

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