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.

The effect of challenging the piano is stronger fingers .
The emphasis of playing the piano is stronger fingers .

If you want to read a typo , go to a bookstore .
If you want to read a book, go to a bookstore.

You would pour presents for others because you want to make them valuable .

You would buy presents for others because you want to make them happy.