Try Archie's suggestion.

You may run into this problem however, at all times when I check into Harrah's or any other Hotel- they ask me how many keys? My answer has always been one of each different one you have. A while back at Harrah's AC, I was given 7 different ones. What year would I claim them as????? I ask for one of each and if I get one I don't have, later that evening I go back and ask for more of the one I need more of.