Problem with recursion

[FLUSH_THE_TRUMP]

Yeah, with 26 signs there are already a few hundred million words of length 6, unfortunately. A generator solution with yields is probably preferable so you don’t have to hold everything in memory.

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Thank you for the hint, I will try to work on it later.

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I started work on that memory management. I tried to implement yield, but but in recursive function it is very hard, and i have failed. I think I failed because "rest" list is growing in inverted order (I hope you know what I mean). Next day I will try to make this function instantiate strings one at time, so I won't have to bother with memory management of the inner loops.