-er -ic a-a a-b a-c a-i aaa aab aac aad aae aai aan aar aau ab- aba abb abc abd abe abi abn abr abu ac- aca acb acc acd ace aci acn acr acu ad- ada adb adc add ade adi adn adr adu aea aeb aec aed aee aei aen aer aeu ai- aia aib aic aid aie aii ain air aiu an- ana anb anc and ane ani ann anr anu ar- ara arb arc ard are ari arn arr aru au- aua aub auc aud aue aui aun aur b-u baa bab bac bad bae bai ban bar bau bba bbb bbc bbd bbe bbi bbn bbr bbu bca bcb bcc bcd bce bci bcn bcr bcu bda bdb bdc bdd bde bdi bdr bdu be- bea beb bec bed bee bei ben ber beu bi- bia bib bic bid bie bii bin bir biu bna bnb bnc bnd bne bni bnn bnr bnu bra brb brd bre bri brn brr bru bua bub buc bud bue bui bun bur buu c-- caa cab cac cad cae cai can car cau cba cbb cbc cbd cbe cbi cbn cbr cbu cca ccb ccc ccd cce cci ccn ccr ccu cda cdb cdc cdd cde cdi cdn cdr cdu ce- cea ceb cec ced cee cei cen cer ceu ci- cia cib cic cid cie cii cin cir ciu cn- cna cnb cnc cnd cne cni cnn cnr cnu cra crb crc crd cre cri crn crr cru cua cub cuc cud cue cui cun cur cuu daa dab dac dad dae dai dan dar dau dba dbb dbc dbd dbe dbi dbn dbr dbu dca dcb dcc dcd dce dci dcn dcr dcu dda ddb ddc ddd dde ddi ddn ddr ddu de- dea deb dec ded dee dei den der deu di- dia dib dic did die dii din dir diu dna dnb dnc dnd dne dni dnn dnr dra drb drc drd dre dri drn drr dru dua dub duc dud due dui dun dur eaa eab eac ead eae eai ean ear eau eba ebb ebc ebd ebe ebi ebn ebr ebu ec- eca ecb ecc ecd ece eci ecn ecr ecu ed- eda edb edc edd ede edi edn edr edu eea eeb eec eed eee een eer eia eib eic eid eie eii ein eir eiu en- ena enb enc end ene eni enn enr enu era erb erc erd ere eri ern err eru eu- eua eub euc eud eue eui eun eur i-d ia- iaa iab iac iad iae iai ian iar iau iba ibb ibc ibd ibe ibi ibn ibr ibu ica icb icc icd ice ici icn icr icu ida idb idc idd ide idi idn idr idu ie- iea iec ied iee iei ien ier iia iib iic iid iie iii iin iir iiu in- ina inb inc ind ine ini inn inr inu ir- ira irb irc ird ire iri irn irr iru iu- iua iub iuc iud iue iui iur n-i naa nab nac nad nae nai nan nar nau nba nbb nbc nbd nbe nbi nbn nbr nbu nca ncb ncc ncd nce nci ncn ncr ncu nda ndb ndc ndd nde ndi ndn ndr ndu ne- nea neb nec ned nee nei nen ner neu nia nib nic nid nie nii nin nir niu nna nnb nnc nne nni nnn nnu nra nrb nrc nrd nre nri nrn nrr nru nua nub nuc nud nue nui nun nur nuu ra- raa rab rac rad rae rai ran rar rau rba rbb rbc rbd rbe rbi rbn rbr rbu rca rcb rcc rcd rce rci rcn rcr rcu rda rdb rdc rdd rde rdi rdn rdr rdu re- rea reb rec red ree rei ren rer reu ria rib ric rid rie rii rin rir rna rnb rnc rnd rni rnn rnr rnu rra rrb rrc rrd rri rrn rrr rru rua rub ruc rud rue rui run rur ruu ua- uaa uab uac uad uae uai uan uar uau uba ubb ubc ube ubi ubn ubr ubu uca ucb ucc ucd uce uci ucn ucr ucu uda udb udc udd ude udi udn udr udu uea ueb uec ued uee uei uen uer uia uib uic uid uie uii uin uir uiu un- una unb unc und une uni unn unr unu ur- ura urb urc urd ure uri urn urr uru uua uuc uue uun uur uuu