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.

[EX Q]: Sentence: 'there is a large black bear that is siting on a rock'. Reverse all words of length '5' in the given sentence.
[EX A]: ereht is a egral kcalb bear that is siting on a rock

[EX Q]: Sentence: 'a horse standing in front of a barn'. Reverse all words of length '1' in the given sentence.
[EX A]: a horse standing in front of a barn

[EX Q]: Sentence: 'a boy laying on the ground playing the wii game'. Reverse all words of length '4' in the given sentence.
[EX A]:
a boy laying on the ground playing the wii emag