-ic a-a a-b a-c a-i aaa aab aac aai aan aar aau ab- aba abb abc abi abn abr abu ac- aca acb acc aci acn acr acu ai- aia aib aic aii ain air aiu an- ana anb anc ani ann anr anu ar- ara arb arc ari arn arr aru au- aua aub auc aui aun aur b-u baa bab bac bai ban bar bau bba bbb bbc bbi bbn bbr bbu bca bcb bcc bci bcn bcr bcu bi- bia bib bic bii bin bir biu bna bnb bnc bni bnn bnr bnu bra brb bri brn brr bru bua bub buc bui bun bur buu c-- caa cab cac cai can car cau cba cbb cbc cbi cbn cbr cbu cca ccb ccc cci ccn ccr ccu ci- cia cib cic cii cin cir ciu cn- cna cnb cnc cni cnn cnr cnu cra crb crc cri crn crr cru cua cub cuc cui cun cur cuu ia- iaa iab iac iai ian iar iau iba ibb ibc ibi ibn ibr ibu ica icb icc ici icn icr icu iia iib iic iii iin iir iiu in- ina inb inc ini inn inr inu ir- ira irb irc iri irn irr iru iu- iua iub iuc iui iur n-i naa nab nac nai nan nar nau nba nbb nbc nbi nbn nbr nbu nca ncb ncc nci ncn ncr ncu nia nib nic nii nin nir niu nna nnb nnc nni nnn nnu nra nrb nrc nri nrn nrr nru nua nub nuc nui nun nur nuu ra- raa rab rac rai ran rar rau rba rbb rbc rbi rbn rbr rbu rca rcb rcc rci rcn rcr rcu ria rib ric rii rin rir rna rnb rnc rni rnn rnr rnu rra rrb rrc rri rrn rrr rru rua rub ruc rui run rur ruu ua- uaa uab uac uai uan uar uau uba ubb ubc ubi ubn ubr ubu uca ucb ucc uci ucn ucr ucu uia uib uic uii uin uir uiu un- una unb unc uni unn unr unu ur- ura urb urc uri urn urr uru uua uuc uun uur uuu