bbb bbd bbi bbk bbn bdb bdd bdi bdk bi- bib bid bii bik bin bkb bkk bkn bnb bnd bni bnk bnn dbb dbd dbi dbk dbn ddb ddd ddi ddk ddn di- dib did dii dik din dkb dki dkk dnb dnd dni dnk dnn i-d ibb ibd ibi ibk ibn idb idd idi idk idn iib iid iii iin ikb iki ikk in- inb ind ini ink inn kbb kbd kbi kbk kbn kdb kdk kib kid kii kik kin kkb kki kkk kkn kn- knd kni knk knn n-i nbb nbd nbi nbk nbn ndb ndd ndi ndk ndn nib nid nii nik nin nki nkk nkn nnb nni nnk nnn