TASK DEFINITION: Given a sentence, generate a new sentence by performing small changes on the sentence. Here, make sure that the changes are semantically related and syntactically similar to the input. And the generated sentence should have high commonsense plausibility, that is to have reasonable probability of it being true.
PROBLEM: An x is used for communicating through the postal system .

SOLUTION: An envelope is used for reading through the postal system .

PROBLEM: If you allow to impact your strength then you should buy different size Bras .

SOLUTION: If you want to test your strength then you should buy different size weights.

PROBLEM: You are likely to find a queen around in a palace.

SOLUTION:
You are incompetent to advise a queen around in a palace .