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.

Input: Consider Input: A smqll, parked blue airplane with a propeller.

Output: smqll,


Input: Consider Input: Big Bne stands tall against the English skyline.

Output: Bne


Input: Consider Input: A room with a window, a bookshelf full of books, a chair with a yellow and gray pillow, a tv stand with a tv and a white couch with a stripped poillow.


Output: poillow.