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 large long train on a steel track'. Reverse all words of length '2' in the given sentence.

A: a large long train no a steel track
****
Q: Sentence: 'a couple of trains are sitting on some tracks'. Reverse all words of length '2' in the given sentence.

A: a couple fo trains are sitting no some tracks
****
Q: Sentence: 'a big sandwich sitting on a plate next to a cup of coffee'. Reverse all words of length '7' in the given sentence.

A:
a big sandwich gnittis on a plate next to a cup of coffee
****