n= 2 3 4 5 6
(8,4) (9,7) (9,3) (10,7) (11,7)
aijklm abcde? acdefg abcde? abkmuz
bijklm fghij? bhijkl fghij? bcpwy?
cnopqr klmno? cmnopq klmno? cdlnvz
dnopqr pqrst? dhnrvy pqrst? deqxu?
estuvw uvwxy? eiosvw uvwxy? efmowz
fstuvw afkpu? fjptwx afkpu? fgryv?
gxyz?? bglqv? gkquxy bglqv? ghnkx?
hxyz?? chmrwz lmrstu chmrwz hisuw?
dinsxz zab??? dinsxz ijoly?
I think I can prove that there is no solution with 11 dice with 9
don't cares or with 10 dice, but I haven't checked all the details, so
I might have made a mistake. In any case, that leaves open the case
of 11 dice with 8 don't cares; my guess is that it is not possible.
-- John Rickard (email@example.com)