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 group of skiers standing at the base of a mountain'. Reverse all words of length '3' in the given sentence.
[A]: a group of skiers standing at eht base of a mountain


[Q]: Sentence: 'a group of motorcycle riders one with a side car'. Reverse all words of length '6' in the given sentence.
[A]: a group of motorcycle sredir one with a side car


[Q]: Sentence: 'an old picture of an old man riding an old motorcycle'. Reverse all words of length '6' in the given sentence.
[A]:
an old picture of an old man gnidir an old motorcycle