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 tenins player returns the ball after his opponent hits it to him.
Example Output: tenins

Example Input: Empy commercial building on a city street corner.
Example Output: Empy

Example Input: Peolpe sitting under an umbrella looking at the scenery.
Example Output:
Peolpe