TASK DEFINITION: In this task, you need to reverse 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 very large truck with people in back on a city street'. Reverse all words of length '6' in the given sentence.

SOLUTION: a very large truck with elpoep in back on a city teerts

PROBLEM: Sentence: 'a lone man smiles brightly in front of his computer'. Reverse all words of length '1' in the given sentence.

SOLUTION: a lone man smiles brightly in front of his computer

PROBLEM: Sentence: 'a close up of a pink fire hydrant on a city street'. Reverse all words of length '5' in the given sentence.

SOLUTION:
a esolc up of a pink fire hydrant on a city street