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

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

    } main {
        Scanner scan = new Scanner(System.in);
        String s = scan.next();
        char a = s.charAt(2);
        char b = s.charAt(3);
        char c = s.charAt(4);
        char d = s.charAt(5);
        if(a == b && c == d){
            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 char a = s.charAt(2); a s.charAt(2) s.charAt s 2 char b = s.charAt(3); b s.charAt(3) s.charAt s 3 char c = s.charAt(4); c s.charAt(4) s.charAt s 4 char d = s.charAt(5); d s.charAt(5) s.charAt s 5 if(a == b && c == d){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        } a == b && c == d a == b a b c == d c d {
            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();
        char a = s.charAt(2);
        char b = s.charAt(3);
        char c = s.charAt(4);
        char d = s.charAt(5);
        if(a == b && c == d){
            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();
        char a = s.charAt(2);
        char b = s.charAt(3);
        char c = s.charAt(4);
        char d = s.charAt(5);
        if(a == b && c == d){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }

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

    }
}