eoeFlappyBird | 一小时学会开发FlappyBird

def decrypt_message(key: int, message: str) -> str:
    """
    >>> decrypt_message(4545, 'VL}p MM{I}p~{HL}Gp{vp pFsH}pxMpyxIx JHL O}F{~pvuOvF{FuF'
    ...                       '{xIp~{HL}Gi')
    'The affine cipher is a type of monoalpha  

def encrypt_message(key: int, message: str) -> str:
    """
    >>> encrypt_message(4545, 'The affine cipher is a type of monoalphabetic '
    ...                       'substitution cipher.')
    'VL}p MM{I}p~{HL}Gp{vp pFsH}pxMpyxIx JHL