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 group of boys surfing in water'. Reverse all words of length '4' in the given sentence.

SOLUTION: a group of syob surfing in water

PROBLEM: Sentence: 'a green apple and knife on dark wooden stairs'. Reverse all words of length '3' in the given sentence.

SOLUTION: a green apple dna knife on dark wooden stairs

PROBLEM: Sentence: 'people on a boat with two males under an umbrella'. Reverse all words of length '2' in the given sentence.

SOLUTION:
people no a boat with two males under na umbrella