import java.util.*; 
import java.lang.*; 

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

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