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");
					System.exit(0);
				}
			}
			System.out.println("No");
	}
} 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");
					System.exit(0);
				}
			}
			System.out.println("No");
	}
} 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");
					System.exit(0);
				}
			}
			System.out.println("No");
	} 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");
					System.exit(0);
				}
			}
			System.out.println("No");
	} 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");
					System.exit(0);
				}
			} 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");
					System.exit(0);
				}
			} if (s.charAt(4)==s.charAt(5)) {
					System.out.println("Yes");
					System.exit(0);
				} 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.exit(0);
				} System.out.println("Yes") System.out.println System.out System System.out "Yes" System.exit(0) System.exit System 0 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) {
		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");
					System.exit(0);
				}
			}
			System.out.println("No");
	}
} 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");
					System.exit(0);
				}
			}
			System.out.println("No");
	}
} 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");
					System.exit(0);
				}
			}
			System.out.println("No");
	}
}
