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.

Sentence: 'a row of parked motorcycles sitting next to a white double decker bus'. Reverse all words of length '7' in the given sentence.
a row of parked motorcycles gnittis next to a white double decker bus

Sentence: 'a group of people wearing skis and standing at the top of a ski slope'. Reverse all words of length '7' in the given sentence.
a group of people gniraew skis and standing at the top of a ski slope

Sentence: 'a clear bag packed up very well and on a hardwood floor'. Reverse all words of length '8' in the given sentence.

a clear bag packed up very well and on a doowdrah floor