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.

An eye can be of many different colours.
An alphabet can be of many opposing colours .

The effect of washing your clothes is having cleaner clothes.
The effect of expanding your clothes is having cleaner clothes .

You are likely to stick a thing in a block - case .

You are likely to find a rat in a pencil - case .