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 peeson sitting down and using a cellular phone.
Example Output: peeson

Example Input: A man weaering a red tie and black jacket walking across a rain soaked parking lot.
Example Output: weaering

Example Input: A gry red and blue helicopter flies in a bright blue sky
Example Output:
gry