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 white bear stuff toy sitting next to a mini chair and book'. Reverse all words of length '1' in the given sentence.
a white bear stuff toy sitting next to a mini chair and book

Sentence: 'a group of five people in white snow outfits cross country skiing'. Reverse all words of length '5' in the given sentence.
a puorg of five people in etihw snow outfits ssorc country skiing

Sentence: 'there are a lot of markers pens and pencils'. Reverse all words of length '2' in the given sentence.

there are a lot fo markers pens and pencils