TASK DEFINITION: In this task, you need to remove all words of a given length in the sentence. The number of letters in a word determine its length, for example, the length of the word "apple" is 5.
PROBLEM: Sentence: 'a black bear sitting on top of a fallen log at a zoo'. Remove all words of length '7' in the given sentence.

SOLUTION: a black bear on top of a fallen log at a zoo

PROBLEM: Sentence: 'a man sanding in a room next to a clock wearing a tie'. Remove all words of length '3' in the given sentence.

SOLUTION: a sanding in a room next to a clock wearing a

PROBLEM: Sentence: 'two cars waiting for a herd of elephants to cross a road'. Remove all words of length '4' in the given sentence.

SOLUTION:
two waiting for a of elephants to cross a