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: Two cars are stopped at a red light and transit buses are in the backround.

A: backround.
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Q: A ruasted-out farm truck in a mountain field beside trees.

A: ruasted-out
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Q: Man n swim trunks finishing a surfing run.

A:
n
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