a-a aaa aaf aak aan aao aar aas aau af- afa aff afk afn afo afr afs afu aka akk akn ako akr aks aku an- ana anf ank ann ano anr ans anu aoa aof aok aon aoo aor aos aou ar- ara arf ark arn aro arr ars aru as- asa asf ask asn aso asr ass asu au- aua auf auk aun auo aur aus faa faf fak fan fao far fas fau ffa fff ffk ffn ffo ffr ffs ffu fka fkf fkk fna fnf fnk fnn fnr fns fnu foa fof fok fon foo for fos fou fra frf frk frn fro frr frs fru fsa fsf fsk fsn fso fsr fss fsu fua fuf fuk fun fuo fur fus fuu ka- kaa kaf kak kan kao kar kas kau kfa kff kfo kfs kfu kkk kkn kkr kks kku kn- kna knf knk knn kno knr knu koa kof kok kon koo kor kos kou kra krf krk krn kro krr krs kru ksa ksf ksk ksn kso ksr kss ksu kuk kun kur kus kuu naa naf nak nan nao nar nas nau nfa nff nfk nfn nfo nfr nfs nfu nka nkf nkk nkn nko nkr nks nku nna nnf nnk nnn nno nns nnu no- noa nof nok non noo nor nos nou nra nrf nrk nrn nro nrr nrs nru nsa nsf nsk nsn nso nsr nss nsu nua nuk nun nuo nur nus nuu oaa oaf oak oan oao oar oas oau of- ofa off ofn ofo ofr ofs ofu oka okk oko okr oks oku on- ona onf onk onn ono onr ons onu oo- ooa oof ook oon ooo oor oos or- ora orf ork orn oro orr ors oru os- osa osf osk osn oso osr oss osu ou- oua ouf ouk oun ouo our ous ra- raa raf rak ran rao rar ras rau rfa rff rfk rfn rfo rfr rfs rfu rkf rkk rko rks rku rna rnn rno rnr rns rnu roa rof rok ron roo ror ros rou rra rrf rrk rrn rrr rrs rru rsa rsf rsk rsn rso rsr rss rsu rua ruf ruk run ruo rur rus ruu saa saf sak san sao sar sas sau sfa sff sfk sfn sfo sfr sfs sfu sk- ska skf skk sko skr sks sku sna snf snk snn sno snr sns snu soa sof sok son soo sor sos sou sr- sra srf srk srn sro srr srs ss- ssa ssf ssk ssn sso ssr sss ssu sua suf suk sun suo sur sus suu ua- uaa uaf uak uan uao uar uas uau ufa uff ufn ufo ufr ufs ufu uka ukf ukk ukn ukr uku un- una unf unk unn uno unr uns unu uoa uok uon uoo uor uos ur- ura urf urk urn uro urr urs uru usa usf usk usn uso usr uss usu uua uun uur uus uuu