-ic a-a a-b a-c a-i aaa aab aac aad aai aan aar aau ab- aba abb abc abd abi abn abr abu ac- aca acb acc acd aci acn acr acu ad- ada adb adc add adi adn adr adu ai- aia aib aic aid aii ain air aiu an- ana anb anc and ani ann anr anu ar- ara arb arc ard ari arn arr aru au- aua aub auc aud aui aun aur b-u baa bab bac bad bai ban bar bau bba bbb bbc bbd bbi bbn bbr bbu bca bcb bcc bcd bci bcn bcr bcu bda bdb bdc bdd bdi bdr bdu bi- bia bib bic bid bii bin bir biu bna bnb bnc bnd bni bnn bnr bnu bra brb brd bri brn brr bru bua bub buc bud bui bun bur buu c-- caa cab cac cad cai can car cau cba cbb cbc cbd cbi cbn cbr cbu cca ccb ccc ccd cci ccn ccr ccu cda cdb cdc cdd cdi cdn cdr cdu ci- cia cib cic cid cii cin cir ciu cn- cna cnb cnc cnd cni cnn cnr cnu cra crb crc crd cri crn crr cru cua cub cuc cud cui cun cur cuu daa dab dac dad dai dan dar dau dba dbb dbc dbd dbi dbn dbr dbu dca dcb dcc dcd dci dcn dcr dcu dda ddb ddc ddd ddi ddn ddr ddu di- dia dib dic did dii din dir diu dna dnb dnc dnd dni dnn dnr dra drb drc drd dri drn drr dru dua dub duc dud dui dun dur i-d ia- iaa iab iac iad iai ian iar iau iba ibb ibc ibd ibi ibn ibr ibu ica icb icc icd ici icn icr icu ida idb idc idd idi idn idr idu iia iib iic iid iii iin iir iiu in- ina inb inc ind ini inn inr inu ir- ira irb irc ird iri irn irr iru iu- iua iub iuc iud iui iur n-i naa nab nac nad nai nan nar nau nba nbb nbc nbd nbi nbn nbr nbu nca ncb ncc ncd nci ncn ncr ncu nda ndb ndc ndd ndi ndn ndr ndu nia nib nic nid nii nin nir niu nna nnb nnc nni nnn nnu nra nrb nrc nrd nri nrn nrr nru nua nub nuc nud nui nun nur nuu ra- raa rab rac rad rai ran rar rau rba rbb rbc rbd rbi rbn rbr rbu rca rcb rcc rcd rci rcn rcr rcu rda rdb rdc rdd rdi rdn rdr rdu ria rib ric rid rii rin rir rna rnb rnc rnd rni rnn rnr rnu rra rrb rrc rrd rri rrn rrr rru rua rub ruc rud rui run rur ruu ua- uaa uab uac uad uai uan uar uau uba ubb ubc ubi ubn ubr ubu uca ucb ucc ucd uci ucn ucr ucu uda udb udc udd udi udn udr udu uia uib uic uid uii uin uir uiu un- una unb unc und uni unn unr unu ur- ura urb urc urd uri urn urr uru uua uuc uun uur uuu