Jim, Sarah and Engagement Ring
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Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen? 
Ring inside with j lock sent another lock on box s lock
Again mailed and j lock opened
Mailed again s lock opened and ring to s
Your Answer
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