LanX,
And I'm stuck finding a formula which calculates all unique solutions
If a letter was allowed to repeat up to the maximum 8 times, the formula is:
(n + (k - 1))!
--------------
k! (n - 1)!
33!
-------- = 13_884_156
8! * 25!
I am not sure how to get from 13_884_156 to 12_461_993 strictly through calculation but it seems like it should be possible.
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