Create a new subclass of Cipher called SwapCipher that performs the following:

Each letter of the alphabet is replaced with a letter from the opposite end of the alphabet. E.g., a is replaced by z, b is replaced by y, etc.

Make sure to account for both upper case as well as lower case.

Create a SwapCipher instance in the main() to demonstrate the new class.

Include your SwapCipher.java and TestCipher.java files

Extra credit: Consider a way to handle special characters.

Please be original in answering this question by not copying off the internet.

Thank you in advance!