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 child sits on a chair next to a bear'. Reverse all words of length '5' in the given sentence.
a dlihc sits on a riahc next to a bear

Sentence: 'competitor preparing to return volley during major tennis tournament'. Reverse all words of length '6' in the given sentence.
competitor preparing to nruter yellov gnirud major sinnet tournament

Sentence: 'a girl wearing a helmet holding a baseball bat'. Reverse all words of length '8' in the given sentence.

a girl wearing a helmet holding a llabesab bat