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 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 baby wearing a bib setting at a table with food on it'. Reverse all words of length '7' in the given sentence.

A: a baby gniraew a bib gnittes at a table with food on it
****
Q: Sentence: 'a whippet dog looks at an open toolbox on a kitchen floor'. Reverse all words of length '1' in the given sentence.

A:
a whippet dog looks at an open toolbox on a kitchen floor
****