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 preson riding a horse on a dirt ground

A: preson
****
Q: A man in yellow shirt sitting at a park bench with bushes in backgrond.

A: backgrond.
****
Q: Vase of flowers in bowl sink near mirror with welcome friends sig.

A:
sig.
****