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 guy on  a surf board by a very big wave'. Reverse all words of length '3' in the given sentence.
answer:
a yug on a surf board by a very gib wave


question:
Sentence: 'a baseball pitcher pitching a ball during a game'. Reverse all words of length '8' in the given sentence.
answer:
a llabesab pitcher gnihctip a ball during a game


question:
Sentence: 'there is a group of sheep outside by a log'. Reverse all words of length '7' in the given sentence.
answer:

there is a group of sheep edistuo by a log