def inverse_Z26(integer):
    """Method Defined to calculate the inverse of \
    an Integer in Z-26  and avoiding ValueError is \
    inverse doesn't exists

    \nPARAMETERS\n
    integer: input integer for inversion

    \nRETURNS\n
    inverse: the inverse of integer in Z-26 \
        (or None if ValueError)
    """

    inverse = None
    try:
        inverse = pow(integer, -1, 26)
    except ValueError:
        print(f"Value of 'a' -> {integer} is Non-Invertible in Z-26.")

    return inverse