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: 'four cute little ducklings swimming in the water'. Reverse all words of length '6' in the given sentence.

SOLUTION: four cute elttil ducklings swimming in the water

PROBLEM: Sentence: 'two people are holding rackets upright on a tennis court'. Reverse all words of length '7' in the given sentence.

SOLUTION: two people are gnidloh stekcar thgirpu on a tennis court

PROBLEM: Sentence: 'a street performer copying a woman on her phone'. Reverse all words of length '7' in the given sentence.

SOLUTION:
a street performer gniypoc a woman on her phone