In this task, you're given a pair of sentences, sentence 1 and sentence 2, that agree with each other. Your job is to alter sentence 2 so that the pair contradict each other. Generated sentences must be short, with less than 15 words. New information can be introduced. Avoid using pronouns to confuse the subject of the sentence.

Ex Input:
Sentence 1: A man stands behind a wall on a busy city street. Sentence 2: The man is obsured from view outside.

Ex Output:
The man is walking down a busy city street.


Ex Input:
Sentence 1: A teenage boy is holding his skateboard. Sentence 2: A boy is posing with a skateboard.

Ex Output:
A boy is posing with a bicycle.


Ex Input:
Sentence 1: A man in a striped top is writing on a blackboard. Sentence 2: A man is wearing a striped shirt.

Ex Output:

A man is not wearing a shirt.