-ic b-u bbb bbc bbi bbn bbu bcb bcc bci bcn bcu bi- bib bic bii bin biu bnb bnc bni bnn bnu bub buc bui bun buu c-- cbb cbc cbi cbn cbu ccb ccc cci ccn ccu ci- cib cic cii cin ciu cn- cnb cnc cni cnn cnu cub cuc cui cun cuu ibb ibc ibi ibn ibu icb icc ici icn icu iib iic iii iin iiu in- inb inc ini inn inu iu- iub iuc iui n-i nbb nbc nbi nbn nbu ncb ncc nci ncn ncu nib nic nii nin niu nnb nnc nni nnn nnu nub nuc nui nun nuu ubb ubc ubi ubn ubu ucb ucc uci ucn ucu uib uic uii uin uiu un- unb unc uni unn unu uuc uun uuu