• Vigenère decypher function

    Returns the decoding of aStr after applying the Vigenère decypher with the key aKey. aStr is supposed to be a string composed uniquely from a-z characters, and aKey is a string composed uniquely from a-z characters.

    Parameters

    • aStr: string

      the string to decypher

    • aKey: string

      the key to use for the Vigenère decypher

    Returns string

    the decyphered string