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I have bunches of these detachable thingies on one bigger ring. Put the rest in my pocket, use the one I need. You can get them at Home Depot where they make key copies.
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>> fastest=[["green",510],["blue",475],["red",650]].sort{|a,b| a[1]<=>b[1]}[0][0].upcase;fastest
=> "BLUE"
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