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.

Example Input: A whiet van is covered with graffiti as it's parked near a curb.
Example Output: whiet

Example Input: tnhis is a man playing a pro sport
Example Output: tnhis

Example Input: A liing room has a fireplace and bookcases in it.
Example Output:
liing