-ic a-a a-b a-c a-i aaa aab aac aai aan aau ab- aba abb abc abi abn abu ac- aca acb acc aci acn acu ai- aia aib aic aii ain aiu an- ana anb anc ani ann anu au- aua aub auc aui aun b-u baa bab bac bai ban bau bba bbb bbc bbi bbn bbu bca bcb bcc bci bcn bcu bi- bia bib bic bii bin biu bna bnb bnc bni bnn bnu bua bub buc bui bun buu c-- caa cab cac cai can cau cba cbb cbc cbi cbn cbu cca ccb ccc cci ccn ccu ci- cia cib cic cii cin ciu cn- cna cnb cnc cni cnn cnu cua cub cuc cui cun cuu ia- iaa iab iac iai ian iau iba ibb ibc ibi ibn ibu ica icb icc ici icn icu iia iib iic iii iin iiu in- ina inb inc ini inn inu iu- iua iub iuc iui n-i naa nab nac nai nan nau nba nbb nbc nbi nbn nbu nca ncb ncc nci ncn ncu nia nib nic nii nin niu nna nnb nnc nni nnn nnu nua nub nuc nui nun nuu ua- uaa uab uac uai uan uau uba ubb ubc ubi ubn ubu uca ucb ucc uci ucn ucu uia uib uic uii uin uiu un- una unb unc uni unn unu uua uuc uun uuu