import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String string = scanner.next();
        if (string.charAt(0) != string.charAt(1) && string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5))
            System.out.println("Yes");
        else
            System.out.println("No");
    }

} import java.util.*; util.* java public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String string = scanner.next();
        if (string.charAt(0) != string.charAt(1) && string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5))
            System.out.println("Yes");
        else
            System.out.println("No");
    }

} Main public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String string = scanner.next();
        if (string.charAt(0) != string.charAt(1) && string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5))
            System.out.println("Yes");
        else
            System.out.println("No");
    } main {
        Scanner scanner = new Scanner(System.in);
        String string = scanner.next();
        if (string.charAt(0) != string.charAt(1) && string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5))
            System.out.println("Yes");
        else
            System.out.println("No");
    } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) String string = scanner.next(); string scanner.next() scanner.next scanner if (string.charAt(0) != string.charAt(1) && string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5))
            System.out.println("Yes");
        else
            System.out.println("No"); string.charAt(0) != string.charAt(1) && string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5) string.charAt(0) != string.charAt(1) && string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5) string.charAt(0) != string.charAt(1) string.charAt(0) string.charAt string 0 string.charAt(1) string.charAt string 1 string.charAt(2) == string.charAt(3) string.charAt(2) string.charAt string 2 string.charAt(3) string.charAt string 3 string.charAt(4) == string.charAt(5) string.charAt(4) string.charAt string 4 string.charAt(5) string.charAt string 5 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 scanner = new Scanner(System.in);
        String string = scanner.next();
        if (string.charAt(0) != string.charAt(1) && string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5))
            System.out.println("Yes");
        else
            System.out.println("No");
    }

} public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String string = scanner.next();
        if (string.charAt(0) != string.charAt(1) && string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5))
            System.out.println("Yes");
        else
            System.out.println("No");
    }

} Main
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String string = scanner.next();
        if (string.charAt(0) != string.charAt(1) && string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5))
            System.out.println("Yes");
        else
            System.out.println("No");
    }

}