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 hoyuse that is very clean and well deocrated
Example Output: hoyuse

Example Input: a nuber of animals on a dirt ground next to a fence
Example Output: nuber

Example Input: Two xcats stare at each other in front of the glass door of a porch.
Example Output:
xcats