So I'm writing a program that encrypts and decrypts a text consisting of letters and other symbols.
Specification
Allow the user to enter a text. All characters are allowed.
Encrypt text.
Use the two keys Rot13 and rot7
Change the key every five characters
Save the encrypted text in a separate string
Print the encrypted string on the screen
Decrypt text
Use the same keys as above
Print the decrypted string on the screen