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.

Example Input: If you want to post a message then you should have an email.
Example Output: If you want to find a message then you should have an email .

Example Input: A waiting room is a plot where a patient sits .
Example Output: A waiting dog is a place where a patient sits .

Example Input: A b can board a foot or bench .
Example Output:
A passenger can smoke a port or cave .