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

[EX Q]: Sentence: 'a man riding skis down a snow covered slope'. Reverse all words of length '5' in the given sentence.
[EX A]: a man riding skis down a snow covered epols

[EX Q]: Sentence: 'a bus parked a long side a road next to a wall'. Reverse all words of length '6' in the given sentence.
[EX A]:
a bus dekrap a long side a road next to a wall