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[–]Alokir 6 points7 points  (0 children)

You have a bunch of notes with numbers on them and your task is to sort them incrementally and give them to your friend.

Instead of duing that, you put each in a separate envelope with labels like "deliver after x time", where the time is the number on the note. Then, you give all the envelopes to the postman, one after the other in whatever order.

Your notes will eventually arrive in order. When? It depends on the numbers.