import java.util.Scanner;

public class Main{
    public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	String s = sc.next();

	char s3 = s.charAt(2);
	char s4 = s.charAt(3);
	char s5 = s.charAt(4);
	char s6 = s.charAt(5);

	if(s3==s4 && s5==s6)
	    System.out.print("Yes");
	else
	    System.out.print("No");
    }
} import java.util.Scanner; Scanner java.util public class Main{
    public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	String s = sc.next();

	char s3 = s.charAt(2);
	char s4 = s.charAt(3);
	char s5 = s.charAt(4);
	char s6 = s.charAt(5);

	if(s3==s4 && s5==s6)
	    System.out.print("Yes");
	else
	    System.out.print("No");
    }
} Main public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	String s = sc.next();

	char s3 = s.charAt(2);
	char s4 = s.charAt(3);
	char s5 = s.charAt(4);
	char s6 = s.charAt(5);

	if(s3==s4 && s5==s6)
	    System.out.print("Yes");
	else
	    System.out.print("No");
    } main {
	Scanner sc = new Scanner(System.in);
	String s = sc.next();

	char s3 = s.charAt(2);
	char s4 = s.charAt(3);
	char s5 = s.charAt(4);
	char s6 = s.charAt(5);

	if(s3==s4 && s5==s6)
	    System.out.print("Yes");
	else
	    System.out.print("No");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc char s3 = s.charAt(2); s3 s.charAt(2) s.charAt s 2 char s4 = s.charAt(3); s4 s.charAt(3) s.charAt s 3 char s5 = s.charAt(4); s5 s.charAt(4) s.charAt s 4 char s6 = s.charAt(5); s6 s.charAt(5) s.charAt s 5 if(s3==s4 && s5==s6)
	    System.out.print("Yes");
	else
	    System.out.print("No"); s3==s4 && s5==s6 s3==s4 s3 s4 s5==s6 s5 s6 System.out.print("Yes") System.out.print System.out System System.out "Yes" System.out.print("No") System.out.print 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();

	char s3 = s.charAt(2);
	char s4 = s.charAt(3);
	char s5 = s.charAt(4);
	char s6 = s.charAt(5);

	if(s3==s4 && s5==s6)
	    System.out.print("Yes");
	else
	    System.out.print("No");
    }
} public class Main{
    public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	String s = sc.next();

	char s3 = s.charAt(2);
	char s4 = s.charAt(3);
	char s5 = s.charAt(4);
	char s6 = s.charAt(5);

	if(s3==s4 && s5==s6)
	    System.out.print("Yes");
	else
	    System.out.print("No");
    }
} Main
import java.util.Scanner;

public class Main{
    public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	String s = sc.next();

	char s3 = s.charAt(2);
	char s4 = s.charAt(3);
	char s5 = s.charAt(4);
	char s6 = s.charAt(5);

	if(s3==s4 && s5==s6)
	    System.out.print("Yes");
	else
	    System.out.print("No");
    }
}
