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No, it can't be transformed back because it has lost information.

2025-06 and 2026-05 both have the same digits, for example.

No, it's an unreversible hash function. I use this for passwords - no one will ever be able to figure out what ehntru2 was originally.

I feel confident it would be one of the six permutations of 2, the, run.

hunter2

No, because "12".sort_by_digits() == "21".sort_by_digits()