I just bought lunch at Quizno's. On top of a cabinet, between the cash register and the fountaion drink machine, in essentially the most prominent place in the establishment is this little framed 3" square metal plaque. It's like a little boiler plate off a machine - the lettering is stamped into the metal. This is what is on the plaque: Code (Text): 12 7 14 13 11 9 8 15 10 It is the numbers 8 through 15 arranged in a seemingly patternless 3x3 grid. I have no idea what the purpose of this little plaque is. Takers?