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]: The man on a red bike is looking baxck.
[A]: baxck.


[Q]: A wonan standing on a bridge holding an umbrella.
[A]: wonan


[Q]: a cot wtih a metal headboard with a blue blanket at the foot of the cot.
[A]:
wtih