One day, I was at work and a friend of mine was trying to recall what his Master lock combination was. He knew the first and last number. I had done a bit of googling and found that if you know the last number of the combination, there is a defined set of possible options! This was promising. After figuring out the algorythm, I set forth on a quest to provide a nice template for him to use when doing the recovery. It turns out that there are only 100 possible combination should you know that last number.
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