Thanks for this and many other quizzes with country names! Many combinations are tested, many interesting remain.
Country names is the best search space I know, because it is definite, has enough cases (196), but is not too large. US states is also good search space, but with 50 cases a little bit too small.
Country names is the best search space I know, because it is definite, has enough cases (196), but is not too large. US states is also good search space, but with 50 cases a little bit too small.