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  1. from itertools import *
  2.  
  3. f = lambda x, y, z, w: ((not w or y) == (not z or x), (not w or y) and (not x) == z)
  4. rows = [(0,'?',0,0,0,1), (0,0,0,'?',0,'?'), (0,1,1,'?','?',0)]
  5.  
  6. for p in permutations('xyzw'):
  7.     if all(any(all(a in ('?', b) for a, b in zip(r, v + f(**dict(zip(p, v)))))
  8.                for v in product((0, 1), repeat=4)) for r in rows):
  9.         print(*p, sep='')
Success #stdin #stdout 0.07s 14212KB
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yzxw
https://ideone.com/QnQhK9
language:
Python 3 (python  3.12)
created:
56 minutes ago
visibility:
public

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