import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
   		String s = sc.nextLine();
      	if(s.substring(2,3).equals(s.substring(3,4)) && s.substring(4,5).equals(s.substring(5,6)))
           System.out.println("Yes");
        else 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.nextLine();
      	if(s.substring(2,3).equals(s.substring(3,4)) && s.substring(4,5).equals(s.substring(5,6)))
           System.out.println("Yes");
        else System.out.println("No");
    	
    }
} Main public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
   		String s = sc.nextLine();
      	if(s.substring(2,3).equals(s.substring(3,4)) && s.substring(4,5).equals(s.substring(5,6)))
           System.out.println("Yes");
        else System.out.println("No");
    	
    } main {
    	Scanner sc = new Scanner(System.in);
   		String s = sc.nextLine();
      	if(s.substring(2,3).equals(s.substring(3,4)) && s.substring(4,5).equals(s.substring(5,6)))
           System.out.println("Yes");
        else System.out.println("No");
    	
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.nextLine(); s sc.nextLine() sc.nextLine sc if(s.substring(2,3).equals(s.substring(3,4)) && s.substring(4,5).equals(s.substring(5,6)))
           System.out.println("Yes");
        else System.out.println("No"); s.substring(2,3).equals(s.substring(3,4)) && s.substring(4,5).equals(s.substring(5,6)) s.substring(2,3).equals(s.substring(3,4)) s.substring(2,3).equals s.substring(2,3) s.substring s 2 3 s.substring(3,4) s.substring s 3 4 s.substring(4,5).equals(s.substring(5,6)) s.substring(4,5).equals s.substring(4,5) s.substring s 4 5 s.substring(5,6) s.substring s 5 6 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){
    	Scanner sc = new Scanner(System.in);
   		String s = sc.nextLine();
      	if(s.substring(2,3).equals(s.substring(3,4)) && s.substring(4,5).equals(s.substring(5,6)))
           System.out.println("Yes");
        else System.out.println("No");
    	
    }
} public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
   		String s = sc.nextLine();
      	if(s.substring(2,3).equals(s.substring(3,4)) && s.substring(4,5).equals(s.substring(5,6)))
           System.out.println("Yes");
        else 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.nextLine();
      	if(s.substring(2,3).equals(s.substring(3,4)) && s.substring(4,5).equals(s.substring(5,6)))
           System.out.println("Yes");
        else System.out.println("No");
    	
    }
}
