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 coulpe of men riding on to of motorcycles with other men sitting on their shoulders.
Example Output: coulpe

Example Input: A little girl is laying down in a cib
Example Output: cib

Example Input: A beautiful woman in a bikini riding a wave on a boadr.
Example Output:
boadr.