static String getReferenceNumber() {
   Scanner refScanner = new Scanner(System.in);
    String referNumber = null;
    System.out.println("Please enter a Reference Number");
    System.out.println("It must be 2 Letters and 3 Numbers and a Number");
    String input = refScanner.nextLine().toUpperCase();
    while (!Policy.refCheck(input)) {

        System.out.println("Please enter a Reference Number");
        System.out.println("It must be 2 Letters and 3 Numbers a Nuber");




    if (input.length() !=5) {
        referNumber = false;
    } else if ((!Character.isLetter(input.charAt(0)))
            ||!Character.isLetter(input.charAt(1))
            ||!Character.isDigit(input.charAt(2))
            ||!Character.isDigit(input.charAt(3))
            ||!Character.isDigit(input.charAt(4))){

    referNumber = false;
}


    System.out.println("");
    System.out.println(referNumber);
    return referNumber;
}