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.
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Question: Sentence: 'a crowd of people skiing and enjoying the snow'. Reverse all words of length '4' in the given sentence.

Answer: a crowd of people skiing and enjoying the wons


Question: Sentence: 'three people with backpacks on skies moving up a hill'. Reverse all words of length '9' in the given sentence.

Answer: three people with skcapkcab on skies moving up a hill


Question: Sentence: 'someone is in the water preparing to water ski'. Reverse all words of length '5' in the given sentence.

Answer:
someone is in the retaw preparing to retaw ski