TASK DEFINITION: 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.
PROBLEM: A brown kitchen filled with metallic appliances and lots of countrs.

SOLUTION: countrs.

PROBLEM: Four ejts fly overhead trailing smoke with a clear blue sky.

SOLUTION: ejts

PROBLEM: A young girl smiles with many people hanging out in the backgrouns

SOLUTION:
backgrouns