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 blue colored sign with a white arrow'. Reverse all words of length '1' in the given sentence.
answer:
a blue colored sign with a white arrow


question:
Sentence: 'a group of people riding in a black raft'. Reverse all words of length '1' in the given sentence.
answer:
a group of people riding in a black raft


question:
Sentence: 'a surfer riding a wave at the beach'. Reverse all words of length '4' in the given sentence.
answer:

a surfer riding a evaw at the beach