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 smqll, parked blue airplane with a propeller.

SOLUTION: smqll,

PROBLEM: Floqers are displayed in a vase made of stone.

SOLUTION: Floqers

PROBLEM: The doubkledecker bus is stopped on the road for the benefit of the passengers.

SOLUTION:
doubkledecker