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 grioup of friends sitting on a couch watching TV together.
[A]: grioup


[Q]: mant air planes on a run way with a sky background
[A]: mant


[Q]: A room with a wnidow, a bookshelf full of books, a chair with a yellow and gray pillow, a tv stand with a tv and a white couch with a stripped pillow.
[A]:
wnidow,