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 man on a surfboard riding a wave in the ocean'. Reverse all words of length '6' in the given sentence.
answer:
a man on a surfboard gnidir a wave in the ocean


question:
Sentence: 'a bunch of umbrellas are up in the air'. Reverse all words of length '9' in the given sentence.
answer:
a bunch of sallerbmu are up in the air


question:
Sentence: 'a hotel room with several suitcases on the floor'. Reverse all words of length '4' in the given sentence.
answer:

a hotel moor htiw several suitcases on the floor