 Cu, which is copper, and Mg. I'm going to put mags on my Mg. Magnesium. Magnesium, yeah. Okay, so do you know the atomic number and all that? No, I carry a computer that's more powerful than the ones used in the Apollo mission now, so why bother? I thought it was going to be something like rail. Oh, light rail, yeah. You know all the lines and who's got it and all that stuff. You're pretty well aware of that.