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: 'there are many animals standing on the top of this mountain'. Reverse all words of length '4' in the given sentence.
there are ynam animals standing on the top of siht mountain

Sentence: 'a woman on the beach getting ready to throw a frisbee'. Reverse all words of length '1' in the given sentence.
a woman on the beach getting ready to throw a frisbee

Sentence: 'a man in glasses and sneakers is posing'. Reverse all words of length '2' in the given sentence.

a man ni glasses and sneakers si posing