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 couple of toothbrushes that are on a towel'. Reverse all words of length '6' in the given sentence.
[A]: a elpuoc of toothbrushes that are on a towel


[Q]: Sentence: 'a white bear stuff toy sitting next to a mini chair and book'. Reverse all words of length '1' in the given sentence.
[A]: a white bear stuff toy sitting next to a mini chair and book


[Q]: Sentence: 'a young boy holding a hot dog while posing for a picture'. Reverse all words of length '7' in the given sentence.
[A]:
a young boy gnidloh a hot dog while posing for a erutcip