a-a aaa aaf aak aan aao aar aas aav af- afa aff afk afn afo afr afs afv aka akk akn ako akr aks akv an- ana anf ank ann ano anr ans anv aoa aof aok aon aoo aor aos aov ar- ara arf ark arn aro arr ars arv as- asa asf ask asn aso asr ass asv av- ava avf avk avn avo avr avs faa faf fak fan fao far fas fav ffa fff ffk ffn ffo ffr ffs ffv fka fkf fkk fna fnf fnk fnn fnr fns fnv foa fof fok fon foo for fos fra frf frk frn fro frr frs fsa fsf fsk fsn fso fsr fss fsv fva fvk ka- kaa kaf kak kan kao kar kas kav kfa kff kfo kfs kkk kkn kkr kks kkv kn- kna knf knk knn kno knr koa kof kok kon koo kor kos kra krf krk krn kro krr krs krv ksa ksf ksk ksn kso ksr kss ksv kva kvk kvn kvo kvr kvs kvv naa naf nak nan nao nar nas nav nfa nff nfk nfn nfo nfr nfs nfv nka nkf nkk nkn nko nkr nks nna nnf nnk nnn nno nns nnv no- noa nof nok non noo nor nos nov nra nrf nrk nrn nro nrr nrs nrv nsa nsf nsk nsn nso nsr nss nsv nva nvk nvn nvv oaa oaf oak oan oao oar oas oav of- ofa off ofn ofo ofr ofs ofv oka okk oko okr oks on- ona onf onk onn ono onr ons oo- ooa oof ook oon ooo oor oos oov or- ora orf ork orn oro orr ors orv os- osa osf osk osn oso osr oss osv ov- ova ovf ovo ovs ovv ra- raa raf rak ran rao rar ras rav rfa rff rfk rfn rfo rfr rfs rfv rkf rkk rko rks rkv rna rnn rno rnr rns rnv roa rof rok ron roo ror ros rov rra rrf rrk rrn rrr rrs rsa rsf rsk rsn rso rsr rss rsv rva rvf rvn rvo rvr rvs rvv saa saf sak san sao sar sas sav sfa sff sfk sfn sfo sfr sfs sfv sk- ska skf skk sko skr sks sna snf snk snn sno snr sns snv soa sof sok son soo sor sos sov sr- sra srf srk srn sro srr srs srv ss- ssa ssf ssk ssn sso ssr sss ssv sva svf svk svn svo svr svs svv v-a vaa vak van vao var vas vav vfa vff vfn vfr vfs vfv vka vn- vna vnf vno vnr vns vnv voa vof vok von voo vor vos vov vra vrf vrk vrn vrr vrs vsa vsf vsk vsn vso vsr vss vsv vva vvo vvr vvs vvv