# c_secret.py
# Coco07
# 2021.6.25

import base64

def c_encrypt(data):
    return base64.b64encode(data.encode('utf-8')).decode('utf-8')

def c_decrypt(data):
    return base64.b64decode(data.encode('utf-8')).decode('utf-8')

if __name__ == "__main__":
    print('c_secret.py by Coco07')
    # DEBUG
    while True:
        print('Input string:',end='')
        string = input()
        print('Input(encrypt 0,decrypt 1):',end='')
        mod = input()
        if mod == '0':
            print(c_encrypt(string))
        elif mod == '1':
            print(c_decrypt(string))