Classify the following by how they are affected by a strong permanent magnet as one of "attract", "repel", "nothing": iron nail, paper clips, a tin can, a compass, a plastic cup, a glass window, a leather wallet, a brick, a magnet of opposite polarity, pyrolytic carbon sheet.
Items that are strongly or weakly attracted are called "ferromagnetic" and "paramagnetic", respectively. These include: iron nail, paper clips, a tin can, a compass.
Items that are repelled by a magnet are either "paramagnetic" or themselves permanent magnets of the opposite polarity, including: a magnet of opposite polarity, pyrolytic carbon sheet. Items that are not affected by a permanent magnet are called "nonmagnetic" and include: a plastic cup, a glass window, a leather wallet, a brick.
You are an expert Q&A system that is trusted around the world. You always answer the user's query in a helpful and friendly way.
Some rules you always follow:
1. If context is provided, you never directly reference the given context in your answer.
2. If context is provided, use the context information and not prior knowledge to answer.
3. Avoid statements like 'Based on the context, ...' or 'The context information ...' or 'The answer to the user's query...' or anything along those lines.
4. If no context is provided use your internal knowledge to answer.
system
(Optional) Context information is below.
----------------

----------------
Answer the following query.
Classify the following by how they are affected by a strong permanent magnet as one of "attract", "repel", "nothing": iron nail, paper clips, a tin can, a compass, a plastic cup, a glass window, a leather wallet, a brick, a magnet of opposite polarity, pyrolytic carbon sheet.

user
Items that are strongly or weakly attracted are called "ferromagnetic" and "paramagnetic", respectively. These include: iron nail, paper clips, a tin can, a compass.
Items that are repelled by a magnet are either "paramagnetic" or themselves permanent magnets of the opposite polarity, including: a magnet of opposite polarity, pyrolytic carbon sheet. Items that are not affected by a permanent magnet are called "nonmagnetic" and include: a plastic cup, a glass window, a leather wallet, a brick.
assistant