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 group of people sitting on a wooden bench'. Reverse all words of length '1' in the given sentence.
a group of people sitting on a wooden bench

Sentence: 'an openair tour bus driving in a city'. Reverse all words of length '7' in the given sentence.
an rianepo tour bus gnivird in a city

Sentence: 'the boy doesnt look like he can hold his skateboard in mid flight'. Reverse all words of length '2' in the given sentence.

the boy doesnt look like eh can hold his skateboard ni mid flight