crea una abm para el nombre y apellido de un cliente.

public static void main (String[] args) {
        Scanner in = new Scanner(System.in);
        String name = "";
        String surname = "";
        String input;
        String[] split;
        int option = 0;
        System.out.println("Hello user. Please enter your name and surname: ");
        
        while (true) {
            input = in.nextLine();
            split = input.split(" ");
            if (isValid(split)) {
                name = split[0];
                surname = split[1];
                break;
            } else {
                System.out.println("Invalid input, please use following format:\n"
                + "name surname\n"
                + "Enter again: ");
            }
        }
        System.out.println("Thank you.\n"
        + "What would you like to do?\n"
        + "1. Show name\n"
        + "2. Show surname\n"
        + "3. Show full name\n"
        + "4.