Question 2 (atbash.py): Create an implementation of the atbash cipher, an ancient en- cryption system created in the Middle East. The Atbash cipher is a simple substitution cipher that relies on transposing all the letters in the alphabet such that the resulting al- phabet is backwards. The first letter is replaced with the last letter, the second with the second-last, and so on.

An Atbash cipher for the Latin alphabet would be as follows:

Plain: abcdefghijklmnopqrstuvwxyz Cipher: zyxwvutsrqponmlkjihgfedcba

Ciphertext is written out in groups of fixed length, the traditional group size being 5 letters, and punctuation is excluded. This is to make it harder to guess things based on word boundaries. Examples

Encoding test gives gvhg

Decoding gvhg gives test

Encoding The quick brown fox jumps over the lazy dog gives gsvjf rxpyi ldmul cqfnk hlevi gsvoz abwlt

Decoding gsvjf rxpyi ldmul cqfnk hlevi gsvoz abwlt gives thequickbrownfoxjumps- overthelazydog

Write two functions named encode and decode. Each of these functions accepts one string argument. For the encode function, it returns the encoded version of the input, based on the given criteria above. For the decode function, it returns the decoded version of an encoded input based on the same criteria. For example, calling encode(test) returnsgvhg and calling decode(gvhg) returns test.

Python Code Please!