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 few various signs hanging on the concrete arhc.
Example Output: arhc.

Example Input: Nutritious pizza with toppings of egg and broccoli are kept in plares.
Example Output: plares.

Example Input: The klittle boy is in his bed. looking a Winnie the Pooh picture book.
Example Output:
klittle