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: 'the city bus has a feature film ad on the side of it'. Reverse all words of length '4' in the given sentence.
the ytic bus has a feature mlif ad on the edis of it

Sentence: 'a beach chair and sandals in the sand'. Reverse all words of length '2' in the given sentence.
a beach chair and sandals ni the sand

Sentence: 'a person holding a sharp knife slicing carrots on a cutting board'. Reverse all words of length '6' in the given sentence.

a nosrep holding a sharp knife slicing carrots on a cutting board