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: 'an umbrella sitting on top of a hill next to a body of water'. Reverse all words of length '4' in the given sentence.
answer:
an umbrella sitting on top of a llih txen to a ydob of water


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 towel surfboard and backpack laying in the sand'. Reverse all words of length '6' in the given sentence.
answer:

a towel surfboard and backpack gniyal in the sand