The given sentence contains a typo which could be one of the following four types: (1) swapped letters of a word e.g. 'niec' is a typo of the word 'nice'. (2) missing letter in a word e.g. 'nic' is a typo of the word 'nice'. (3) extra letter in a word e.g. 'nicce' is a typo of the word 'nice'. (4) replaced letter in a word e.g 'nicr' is a typo of the word 'nice'. You need to identify the typo in the given sentence. To do this, answer with the word containing the typo.

[EX Q]: Fou frames of different people doing various activity's.
[EX A]: Fou

[EX Q]: Peolpe at an underground train station with a red train.
[EX A]: Peolpe

[EX Q]: Three people in a office or living room having a good time.
[EX A]:
None