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 peson sitting down and using a cellular phone.
Example Output: peson

Example Input: A laoptop and bowl of food sits on top of the food.
Example Output: laoptop

Example Input: A wonman holding a tennis racket in her hand standing next to a ball.
Example Output:
wonman