What is the input process and output of a can opener?

The input of a can opener is the can that needs to be opened, typically made of metal and sealed with a lid. The process involves placing the can opener on the lid, engaging the cutting wheel, and turning the handle, which pierces and cuts through the metal lid. The output is the opened can, allowing access to its contents. Additionally, the can opener may produce small metal shavings or the removed lid as a byproduct.