#!/bin/python

import sys, getopt, os 

def main(argv):
    comp1 = ''
    comp2 = ''
    comp3 = ''  

    try:
        opts, args = getopt.getopt(argv,"h:1:2:3:",["comp1=","comp2=","comp3="])
    except getopt.GetoptError:
        print ('test.py -i <inputfile> -a <address>  -p <port>')
        sys.exit(2)
    for opt, arg in opts:
        if opt == '-h':
            print ('test.py -i <inputfile>  -a <address>  -p <port>')
            sys.exit()
        elif opt in ("-1","--comp1"):
            comp1 = str(arg)
        elif opt in ("-2","--comp2"):
            comp2 = str(arg)
        elif opt in ("-3","--comp3"):
            comp3 = str(arg)
    
    if (len(comp1) != len(comp2)) or (len(comp1) != len(comp3)):
        print("All components should be of the same length")
        sys.exit(2)
    
    if len(comp1) not in (16, 32, 64, 128, 256):
        print("All components should be of byte length")
        print(len(comp1))
        print(len(comp2))
        print(len(comp3))
        sys.exit(2)

    bytes1 =  bytes.fromhex( comp1.encode("utf-8").hex())
    bytes2 =  bytes.fromhex( comp2.encode("utf-8").hex())
    bytes3 =  bytes.fromhex( comp3.encode("utf-8").hex())
    e = bytearray()
    for c,d,f   in zip(bytes1,bytes2,bytes3):
       e.append( ( c ^ d  ^ f  ) )
    print(e.hex())


if __name__ == "__main__":
    main(sys.argv[1:])