#!/usr/bin/env python3
# -*- coding: utf-8 -*-

print("XOR two binaries")
while True:
    try:
        print("Please enter 1st binary (null to exit)")
        b1 = input()
        if len(b1) < 1:
            exit()
        print("Please enter 2nd binary")
        b2 = input()
        x = eval("0b"+b1+" ^ "+"0b"+b2)
        print(f"{x:#07b}"[2:], "is XOR")
    except SystemExit:
        exit()
    except:
        print("Only 1 or 0 allowed")
    if len(b1)==5 and len(b2)==5:
        #also perform Tunny "addition"
        # 0&0 = 1
        # 0&1 = 0
        # 1&0 = 0
        # 1&1 = 1
        y = ""
        for i in range(5):
            if b1[i]==b2[i]:
                y += "1"
            else:
                y += "0"
        print(y, "is Tunny sum")                

    
   
print("Goodbye")