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:
The horses are pulling the carriage on the street while men unload qa box.

Ex Output:
qa


Ex Input:
A womna and a man holding Nintendo Wii game controllers.

Ex Output:
womna


Ex Input:
Two wome wearing white tennis dresses and holding rackets are walking on each side of the tennis court net.

Ex Output:

wome