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: Fouer people waiting for a ski lift up a mountain.
Example Output: Fouer

Example Input: A mabn is holding a cell phone next to a girl, who is holding a drink.
Example Output: mabn

Example Input: A kitchen sink counter full of beer bottlse.
Example Output:
bottlse.