instruction:
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.
question:
Sentence: 'a river filled with lots of boats and surrounded by buildings'. Reverse all words of length '4' in the given sentence.
answer:
a river filled htiw stol of boats and surrounded by buildings


question:
Sentence: 'a shirtless man lays on a bed and smiles'. Reverse all words of length '9' in the given sentence.
answer:
a sseltrihs man lays on a bed and smiles


question:
Sentence: 'a couch that has some cats on it'. Reverse all words of length '2' in the given sentence.
answer:

a couch that has some cats no ti