private void changeDigits(int k, Number originalNumber) {
			for (int i = 0; i < 9; i++) {
				numbers[k] = new Number(numbers[k].changeNumber(i));
				if (validator.validateAccountNumber()) {
					String possibleAccountNumber = "";
					for (int j = 0; j < 9; j++) {
						if (j == 0) {
							possibleAccountNumber = numbers[j].toString();
						} else {
							possibleAccountNumber += numbers[j].toString();
						}
					}
					amountOfPossibleNumbers++;
					accountNumber = getAccountNumber();
					addToArrayOfPossibleNumbers(possibleAccountNumber);
					
				}
				numbers[k] = originalNumber;
			}
	}