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 cat attentively watching a graphic on a television screen'. Reverse all words of length '7' in the given sentence.
a cat attentively watching a cihparg on a television screen

Sentence: 'a woman sitting at an outside patio table under a blue umbrella eating food'. Reverse all words of length '7' in the given sentence.
a woman gnittis at an edistuo patio table under a blue umbrella eating food

Sentence: 'a person is standing next to a horse between a fence'. Reverse all words of length '4' in the given sentence.

a person is standing txen to a horse between a fence