#!/usr/bin/env python

from sys import argv, stderr, exit

if __name__ == "__main__":
    if len(argv[1:]) != 1:
        print('usage: %s PATH' % argv[0])
        exit(0)
    path = argv[1]

    # we index each pixel into this list to see what value to use
    # this should be exactly 4 values in the range 0-3.
    # normally you won't want two duplicate values, since this
    # will lose information.
    translate = [3, 1, 2, 0]

    for i, line in enumerate(open(path, 'r')):
        toks = line.strip().split()
        if len(toks) != 16:
            stderr.write('line %d is invalid: %r\n' % (i + 1, line))
            exit(1)
        bytes = [int(t, 16) for t in toks]
        output = [0] * 16

        for i in range(0, 8):
            for j in range(0, 8):
                x = (bytes[i] >> j) & 1
                y = (bytes[i + 8] >> j) & 1
                z = translate[x + y * 2]
                output[i] |= ((z & 1) << j)
                output[i + 8] |= (((z & 2) << j) // 2)
        print(' '.join(['%02x' % o for o in output]))