Number of people: 7 people, 1 undercover, and some onlookers in unknown so.

Rules of the game: Six of the seven people present got the same word, and the rest 1 got another related word.

Everyone can only say one sentence each round to describe the word he has got (you can't say that word directly), and if you can't let undercover find it, you should also give a hint to your compatriots.

After each round of description, seven people voted for the suspected undercover, and the person with the most votes was out. If the number of people is up to two, it is to be determined (that is, reserved).

If there is an undercover until the last three people are left, undercover wins, otherwise the big army wins.