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: If you want to make a better world then you should exchange with others .

SOLUTION: If you want to avoid a better confrontation then you should help with others .

PROBLEM: Smoking cigarettes is a nasty Business .

SOLUTION: Smoking cigarettes is a nasty habit.

PROBLEM: People often need support when walking.

SOLUTION:
People often need aide when walking .