The following characters should be added to equivset.in
10C Č => 43 C 106 Ć => 43 C 17D Ž => 5A Z
They are common in a few Slavic languages (Č=č, ć=Ć, ž=Ž, just like đ=Đ and š=Š, which are present in the file). Abuse filters fail since ccnorm("Č") ~= "C".