import java.util.Scanner;

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

        String S = scan.next();
        scan.close();
        
        boolean isTrue = true;

        if(S.charAt(2)!=S.charAt(3)) isTrue = false;
        else if(S.charAt(4)!=S.charAt(5)) isTrue = false; 
        
        if(isTrue) 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();
        scan.close();
        
        boolean isTrue = true;

        if(S.charAt(2)!=S.charAt(3)) isTrue = false;
        else if(S.charAt(4)!=S.charAt(5)) isTrue = false; 
        
        if(isTrue) 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();
        scan.close();
        
        boolean isTrue = true;

        if(S.charAt(2)!=S.charAt(3)) isTrue = false;
        else if(S.charAt(4)!=S.charAt(5)) isTrue = false; 
        
        if(isTrue) System.out.println("Yes");
        else System.out.println("No");
    } main {
        Scanner scan = new Scanner(System.in);

        String S = scan.next();
        scan.close();
        
        boolean isTrue = true;

        if(S.charAt(2)!=S.charAt(3)) isTrue = false;
        else if(S.charAt(4)!=S.charAt(5)) isTrue = false; 
        
        if(isTrue) 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 scan.close() scan.close scan boolean isTrue = true; isTrue true if(S.charAt(2)!=S.charAt(3)) isTrue = false;
        else if(S.charAt(4)!=S.charAt(5)) isTrue = false; S.charAt(2)!=S.charAt(3) S.charAt(2) S.charAt S 2 S.charAt(3) S.charAt S 3 isTrue = false isTrue false if(S.charAt(4)!=S.charAt(5)) isTrue = false; S.charAt(4)!=S.charAt(5) S.charAt(4) S.charAt S 4 S.charAt(5) S.charAt S 5 isTrue = false isTrue false if(isTrue) System.out.println("Yes");
        else System.out.println("No"); isTrue 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 scan = new Scanner(System.in);

        String S = scan.next();
        scan.close();
        
        boolean isTrue = true;

        if(S.charAt(2)!=S.charAt(3)) isTrue = false;
        else if(S.charAt(4)!=S.charAt(5)) isTrue = false; 
        
        if(isTrue) 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();
        scan.close();
        
        boolean isTrue = true;

        if(S.charAt(2)!=S.charAt(3)) isTrue = false;
        else if(S.charAt(4)!=S.charAt(5)) isTrue = false; 
        
        if(isTrue) 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();
        scan.close();
        
        boolean isTrue = true;

        if(S.charAt(2)!=S.charAt(3)) isTrue = false;
        else if(S.charAt(4)!=S.charAt(5)) isTrue = false; 
        
        if(isTrue) System.out.println("Yes");
        else System.out.println("No");
    }
}