a-a aaa aaf aak aam aan aao aar aas af- afa aff afk afm afn afo afr afs aka akk akm akn ako akr aks ama amf amk amm amn amo amr ams an- ana anf ank anm ann ano anr ans aoa aof aok aom aon aoo aor aos ar- ara arf ark arm arn aro arr ars as- asa asf ask asm asn aso asr ass faa faf fak fam fan fao far fas ffa fff ffk ffm ffn ffo ffr ffs fka fkf fkk fkm fma fmf fmm fmn fmo fmr fms fna fnf fnk fnm fnn fnr fns foa fof fok fom fon foo for fos fra frf frk frm frn fro frr frs fsa fsf fsk fsm fsn fso fsr fss ka- kaa kaf kak kam kan kao kar kas kfa kff kfm kfo kfs kkk kkm kkn kkr kks kma kmf kmk kmm kmo kms kn- kna knf knk knm knn kno knr koa kof kok kom kon koo kor kos kra krf krk krn kro krr krs ksa ksf ksk ksm ksn kso ksr kss m-f m-o m-r maa maf mak mam man mao mar mas mfa mff mfm mfn mfo mfr mfs mka mkk mkm mkn mko mkr mks mma mmf mmk mmm mmn mmo mmr mms mna mnf mnk mnm mnn mno mnr mns moa mof mok mom mon moo mor mos mra mrf mrk mrm mrn mro mrr mrs msa msf msk msm msn mso msr mss naa naf nak nam nan nao nar nas nfa nff nfk nfn nfo nfr nfs nka nkf nkk nkm nkn nko nkr nks nma nmk nmm nmn nmo nmr nms nna nnf nnk nnm nnn nno nns no- noa nof nok nom non noo nor nos nra nrf nrk nrm nrn nro nrr nrs nsa nsf nsk nsm nsn nso nsr nss oaa oaf oak oam oan oao oar oas of- ofa off ofm ofn ofo ofr ofs oka okk oko okr oks om- oma omf omm omn omo omr oms on- ona onf onk onn ono onr ons oo- ooa oof ook oom oon ooo oor oos or- ora orf ork orm orn oro orr ors os- osa osf osk osm osn oso osr oss ra- raa raf rak ram ran rao rar ras rfa rff rfk rfm rfn rfo rfr rfs rkf rkk rkm rko rks rma rmf rmm rmn rmo rmr rms rna rnm rnn rno rnr rns roa rof rok rom ron roo ror ros rra rrf rrk rrm rrn rrr rrs rsa rsf rsk rsm rsn rso rsr rss saa saf sak sam san sao sar sas sfa sff sfk sfm sfn sfo sfr sfs sk- ska skf skk skm sko skr sks sma smf smk smm smn smo smr sms sna snf snk snm snn sno snr sns soa sof sok som son soo sor sos sr- sra srf srk srm srn sro srr srs ss- ssa ssf ssk ssm ssn sso ssr sss