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 small child having his teeth brushed by an adult'. Reverse all words of length '7' in the given sentence.
answer:
a small child having his teeth dehsurb by an adult


question:
Sentence: 'a group of people eating a cake on a table'. Reverse all words of length '6' in the given sentence.
answer:
a group of elpoep gnitae a cake on a table


question:
Sentence: 'a little boy playing ball in the park'. Reverse all words of length '1' in the given sentence.
answer:

a little boy playing ball in the park