Break a safe
Created on Oct. 2, 2020 by Julien Palard
You found a safe. There's a numeric keypad on it...
The keypad is dirty, thanks to this you can easily spot that numbers
1, 5, and 8 are frequently used. It's so clear that you guess no
other digit is in use in this code.
Write a script printing all combinations of 4 digits that use all of
those used digits.
Output one combination per line, separate digits using spaces, so your output should look like:
1 1 5 8
1 5 5 8
1 5 8 8
...
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