-ic a-a a-b a-c a-i aaa aab aac aai aan aao aar aas aau ab- aba abb abc abi abn abo abr abs abu ac- aca acb acc aci acn aco acr acs acu ai- aia aib aic aii ain aio air ais aiu an- ana anb anc ani ann ano anr ans anu aoa aob aoc aoi aon aoo aor aos aou ar- ara arb arc ari arn aro arr ars aru as- asa asb asc asi asn aso asr ass asu au- aua aub auc aui aun auo aur aus b-u baa bab bac bai ban bao bar bas bau bba bbb bbc bbi bbn bbo bbr bbs bbu bca bcb bcc bci bcn bco bcr bcs bcu bi- bia bib bic bii bin bio bir bis biu bna bnb bnc bni bnn bno bnr bns bnu boa bob boc boi bon boo bor bos bou bra brb bri brn bro brr brs bru bsa bsb bsc bsi bsn bso bsr bss bsu bua bub buc bui bun buo bur bus buu c-- caa cab cac cai can cao car cas cau cba cbb cbc cbi cbn cbo cbr cbs cbu cca ccb ccc cci ccn cco ccr ccs ccu ci- cia cib cic cii cin cio cir cis ciu cn- cna cnb cnc cni cnn cno cnr cns cnu co- coa cob coc coi con coo cor cos cou cra crb crc cri crn cro crr crs cru csa csb csc csi csn cso csr css csu cua cub cuc cui cun cuo cur cus cuu ia- iaa iab iac iai ian iao iar ias iau iba ibb ibc ibi ibn ibo ibr ibs ibu ica icb icc ici icn ico icr ics icu iia iib iic iii iin iio iir iis iiu in- ina inb inc ini inn ino inr ins inu io- ioa iob ioc ioi ion ioo ior ios iou ir- ira irb irc iri irn iro irr irs iru is- isa isb isc isi isn iso isr iss isu iu- iua iub iuc iui iur ius n-i naa nab nac nai nan nao nar nas nau nba nbb nbc nbi nbn nbo nbr nbs nbu nca ncb ncc nci ncn nco ncr ncs ncu nia nib nic nii nin nio nir nis niu nna nnb nnc nni nnn nno nns nnu no- noa nob noc noi non noo nor nos nou nra nrb nrc nri nrn nro nrr nrs nru nsa nsb nsc nsi nsn nso nsr nss nsu nua nub nuc nui nun nuo nur nus nuu o-i oaa oab oac oai oan oao oar oas oau ob- oba obb obc obi obn obo obr obs obu oc- oca ocb occ oci ocn oco ocr ocs ocu oia oib oic oii oin oio oir ois oiu on- ona onb onc oni onn ono onr ons onu oo- ooa oob ooc ooi oon ooo oor oos or- ora orb orc ori orn oro orr ors oru os- osa osb osc osi osn oso osr oss osu ou- oua ouc oui oun ouo our ous ra- raa rab rac rai ran rao rar ras rau rba rbb rbc rbi rbn rbo rbr rbs rbu rca rcb rcc rci rcn rco rcr rcs rcu ria rib ric rii rin rio rir ris rna rnb rnc rni rnn rno rnr rns rnu roa rob roc roi ron roo ror ros rou rra rrb rrc rri rrn rrr rrs rru rsa rsb rsc rsi rsn rso rsr rss rsu rua rub ruc rui run ruo rur rus ruu saa sab sac sai san sao sar sas sau sba sbb sbc sbi sbn sbo sbr sbs sbu sca scb scc sci scn sco scr scs scu sia sib sic sii sin sio sir sis siu sna snb snc sni snn sno snr sns snu soa sob soc soi son soo sor sos sou sr- sra srb src sri srn sro srr srs ss- ssa ssb ssc ssi ssn sso ssr sss ssu sua sub suc sui sun suo sur sus suu ua- uaa uab uac uai uan uao uar uas uau uba ubb ubc ubi ubn ubo ubr ubs ubu uca ucb ucc uci ucn uco ucr ucs ucu uia uib uic uii uin uio uir uis uiu un- una unb unc uni unn uno unr uns unu uoa uob uoc uon uoo uor uos ur- ura urb urc uri urn uro urr urs uru usa usb usc usi usn uso usr uss usu uua uuc uun uur uus uuu