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.

Q: Sentence: 'a train is in a depot at the platform entry'. Reverse all words of length '2' in the given sentence.

A: a train si ni a depot ta the platform entry
****
Q: Sentence: 'a street pole with some signs sitting on top of it'. Reverse all words of length '6' in the given sentence.

A: a teerts pole with some signs sitting on top of it
****
Q: Sentence: 'a red and black train sitting on train tracks near gravel'. Reverse all words of length '3' in the given sentence.

A:
a der dna black train sitting on train tracks near gravel
****