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 red and blue fire hydrant near a tir.
Example Output: tir.

Example Input: a sniwy slope and a skier with a yellow jacket on
Example Output: sniwy

Example Input: A little firl is wearing a princess hat while others wait for the cake to be cut.
Example Output:
firl