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 is a large black bear that is siting on a rock'. Reverse all words of length '5' in the given sentence.
ereht is a egral kcalb bear that is siting on a rock

Sentence: 'a street next to two road blocks and a blurry object'. Reverse all words of length '3' in the given sentence.
a street next to owt road blocks dna a blurry object

Sentence: 'there are a pair of slippers in the entrance of this bathroom'. Reverse all words of length '8' in the given sentence.

there are a pair of sreppils in the ecnartne of this moorhtab