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 man laying on a bench and a woman next to him touching his face'. Reverse all words of length '4' in the given sentence.
a man laying on a bench and a woman txen to him touching his ecaf

Sentence: 'airplane flying in front of mountains and clouds'. Reverse all words of length '2' in the given sentence.
airplane flying ni front fo mountains and clouds

Sentence: 'a man sitting on a bench talking on a cellular phone'. Reverse all words of length '8' in the given sentence.

a man sitting on a bench talking on a ralullec phone