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.

Ex Input:
A room filed with an old fashioned stove and  a bear skin rug mounted on it's wall.

Ex Output:
filed


Ex Input:
A chresy pizza sitting on top of a white plate.

Ex Output:
chresy


Ex Input:
A peeson is riding in a cart pulled by a horse.

Ex Output:

peeson