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 train is in a depot at the platform entry'. Reverse all words of length '2' in the given sentence.
a train si ni a depot ta the platform entry

Sentence: 'a man riding on the back of a horse through a leaf covered forest'. Reverse all words of length '3' in the given sentence.

a nam riding on eht back of a horse through a leaf covered forest