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 lidt on a snowy hill bordered by image of film roll.
Example Output: lidt

Example Input: A zevbra eating food in a enclosure with a man and baby looking on.
Example Output: zevbra

Example Input: two big black bears are sitting next to a fenec
Example Output:
fenec