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.

Q: a gyu doing a trick with a green skateboard

A: gyu
****
Q: The opolice officers are standing on the side of the road.

A: opolice
****
Q: A big fat asandwich sits on a white plate ona  table by a potted plant and an ash tray.

A:
asandwich
****