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 black cat sitting on top of a laptop on a table'. Reverse all words of length '5' in the given sentence.
answer:
a kcalb cat sitting on top of a laptop on a elbat


question:
Sentence: 'two dogs plays together on the ground in the dirt'. Reverse all words of length '3' in the given sentence.
answer:

owt dogs plays together on eht ground in eht dirt