-er -ic a-a a-b a-c a-i aaa aab aac aae aai aan aar aau ab- aba abb abc abe abi abn abr abu ac- aca acb acc ace aci acn acr acu aea aeb aec aee aei aen aer aeu ai- aia aib aic aie aii ain air aiu an- ana anb anc ane ani ann anr anu ar- ara arb arc are ari arn arr aru au- aua aub auc aue aui aun aur b-u baa bab bac bae bai ban bar bau bba bbb bbc bbe bbi bbn bbr bbu bca bcb bcc bce bci bcn bcr bcu be- bea beb bec bee bei ben ber beu bi- bia bib bic bie bii bin bir biu bna bnb bnc bne bni bnn bnr bnu bra brb bre bri brn brr bru bua bub buc bue bui bun bur buu c-- caa cab cac cae cai can car cau cba cbb cbc cbe cbi cbn cbr cbu cca ccb ccc cce cci ccn ccr ccu ce- cea ceb cec cee cei cen cer ceu ci- cia cib cic cie cii cin cir ciu cn- cna cnb cnc cne cni cnn cnr cnu cra crb crc cre cri crn crr cru cua cub cuc cue cui cun cur cuu eaa eab eac eae eai ean ear eau eba ebb ebc ebe ebi ebn ebr ebu ec- eca ecb ecc ece eci ecn ecr ecu eea eeb eec eee een eer eia eib eic eie eii ein eir eiu en- ena enb enc ene eni enn enr enu era erb erc ere eri ern err eru eu- eua eub euc eue eui eun eur ia- iaa iab iac iae iai ian iar iau iba ibb ibc ibe ibi ibn ibr ibu ica icb icc ice ici icn icr icu ie- iea iec iee iei ien ier iia iib iic iie iii iin iir iiu in- ina inb inc ine ini inn inr inu ir- ira irb irc ire iri irn irr iru iu- iua iub iuc iue iui iur n-i naa nab nac nae nai nan nar nau nba nbb nbc nbe nbi nbn nbr nbu nca ncb ncc nce nci ncn ncr ncu ne- nea neb nec nee nei nen ner neu nia nib nic nie nii nin nir niu nna nnb nnc nne nni nnn nnu nra nrb nrc nre nri nrn nrr nru nua nub nuc nue nui nun nur nuu ra- raa rab rac rae rai ran rar rau rba rbb rbc rbe rbi rbn rbr rbu rca rcb rcc rce rci rcn rcr rcu re- rea reb rec ree rei ren rer reu ria rib ric rie rii rin rir rna rnb rnc rni rnn rnr rnu rra rrb rrc rri rrn rrr rru rua rub ruc rue rui run rur ruu ua- uaa uab uac uae uai uan uar uau uba ubb ubc ube ubi ubn ubr ubu uca ucb ucc uce uci ucn ucr ucu uea ueb uec uee uei uen uer uia uib uic uie uii uin uir uiu un- una unb unc une uni unn unr unu ur- ura urb urc ure uri urn urr uru uua uuc uue uun uur uuu