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.

Q: Sentence: 'a happy white man with sunglasses on a boat'. Reverse all words of length '1' in the given sentence.

A: a happy white man with sunglasses on a boat
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Q: Sentence: 'a man assisting a person on a horse on a race track'. Reverse all words of length '3' in the given sentence.

A: a nam assisting a person on a horse on a race track
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Q: Sentence: 'a group of boys sitting on the steps behind baseball equipment'. Reverse all words of length '9' in the given sentence.

A:
a group of boys sitting on the steps behind baseball tnempiuqe
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