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.

[EX Q]: Sentence: 'there is a group of people standing on the beach'. Reverse all words of length '8' in the given sentence.
[EX A]: there is a group of people gnidnats on the beach

[EX Q]: Sentence: 'two small children and childrens books on a blue carpeted floor'. Reverse all words of length '1' in the given sentence.
[EX A]: two small children and childrens books on a blue carpeted floor

[EX Q]: Sentence: 'there is plenty of fresh fruit on the counter in the kitchen'. Reverse all words of length '7' in the given sentence.
[EX A]:
there is plenty of fresh fruit on the retnuoc in the nehctik