## Upgraded Affine

#### Classical cipher with a modern twist

`hello, world.`

, key being `(2,5)`

, and IV = `e`

, I do not get the ciphertext displayed. Trying just the numberic table representation `('h' = 7)`

and `('e' = 4)`

, or the ascii character's hexidecimal value, and then either encrypting before or after, I simply do not get the same ciphertext result.

*DOES NOT* use XOR.
As a hint, it is some *other* arithmetic between the previous and current ciphertext for decryption, with the Affine cipher still being used as stated.