-ic b-u bbb bbc bbi bbn bbu bcb bcc bci bcn bcu bcz bi- bib bic bii bin biu biz bnb bnc bni bnn bnu bnz bub buc bui bun buu buz bzn bzu bzz c-- cbb cbc cbi cbn cbu cbz ccb ccc cci ccn ccu ccz ci- cib cic cii cin ciu cn- cnb cnc cni cnn cnu cub cuc cui cun cuu cuz cz- czc ibb ibc ibi ibn ibu ibz icb icc ici icn icu icz iib iic iii iin iiu in- inb inc ini inn inu iu- iub iuc iui iuz izi izu izz n-i nbb nbc nbi nbn nbu ncb ncc nci ncn ncu nib nic nii nin niu niz nnb nnc nni nnn nnu nnz nub nuc nui nun nuu nzb nzi nzz ubb ubc ubi ubn ubu ucb ucc uci ucn ucu uib uic uii uin uiu un- unb unc uni unn unu uuc uun uuu uzb uzi uzu zbb zbc zib zin ziz znc znn zub zuc zui zun zuz zzz