lower(A𐐀) = A𐐀 (should be a𐐨)

upper(a𐐨) = a𐐨 (should be A𐐀)

lower(ΚΟΣΜΟΣ) = ΚΟΣΜΟΣ (should be κοσμος)

upper(ß) = ß (should be SS)

upper(ʼn) = ʼn (should be ʼN)

upper(ǰ) = ǰ (should be J̌)

upper(ffi) = ffi (should be FFI)

lower(IJ) = IJ (should be ij)