Work keys and house keys

For the last three years I have had my own set of work keys (for my classroom, for a random door in the school I work at, and for some cabinets in my classroom). During that time, I have kept my work keys on the same keychain as my house keys and car keys. This makes for a rather large keychain, and is generally just a pain in the neck. This school year I decided to start a new system and to keep two separate keychains. Not only do I not have one gigantic keychain anymore, but this also serves to symbolize my newfound goal of keeping greater distance between my home and work lives. My co-worker Don even gave me a nice, shiny, new Toyota Trucks keychain (even though my pickup is a Nissan...) Unfortunately, however, today is my second day back at work, and I have already lost my work keys. I wonder where they are?