SHbIFR

def encrypt(msg , key):
    encrpt = ' '
    for i,j in  enumerate(msg):
        if ord(j) in range(97,123):
            j = j.upper()
            num = ord(key[i]) + ord(j)
            encrpts = chr(num%26 + ord('A')).lower()
            encrpt += encrpts
            print (encrpt)

        else:
            num = ord(key[i]) + ord(j)
            encrpts = chr(num%26 + ord('A'))
            encrpt += encrpts
            print (encrpt)
    print ("Encrypted: ",encrpt)


def decrypt(msg , key):
    dcrpt = ' '
    for i,j in enumerate(msg):
        if ord(j) in range(97,123):
            j = j.upper()
            num = ord(j) - ord(key[i])
            dcrpts = chr(num%26+ord('A')).lower()
            dcrpt += dcrpts

        else:
            num = ord(j) - ord(key[i])
            dcrpts = chr(num%26 + ord('A'))
            dcrpt += dcrpts
    print ("Decrypted: ",dcrpt)



oper = int(input("Encrypt:{}\nDecrypt:{} ".format('1','0')))
msg = input()
key = input()
key*=len(msg)//len(key)
key += key[0:len(msg)%len(key)]
print("{}\n{}".format(msg,key))
if oper == 0:
    del oper
    decrypt(msg,key)
else:
    del oper
    encrypt(msg , key)