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: 'an elephant is in a large field standing in the grass'. Reverse all words of length '1' in the given sentence.

SOLUTION: an elephant is in a large field standing in the grass

PROBLEM: Sentence: 'two doubledecker buses are parked at a bus stop next to some buildings with another doubledecker bus on the road going the other direction behind them'. Reverse all words of length '1' in the given sentence.

SOLUTION: two doubledecker buses are parked at a bus stop next to some buildings with another doubledecker bus on the road going the other direction behind them

PROBLEM: Sentence: 'young girl dressed in tennis whites holding tennis racket on grass field'. Reverse all words of length '4' in the given sentence.

SOLUTION:
young lrig dressed in tennis whites holding tennis racket on grass field