-er a-a aaa aae aaf aak aan aao aap aar aas aea aee aef aek aen aeo aep aer aes af- afa afe aff afk afn afo afp afr afs aka ake akk akn ako akp akr aks an- ana ane anf ank ann ano anp anr ans aoa aoe aof aok aon aoo aop aor aos ap- apa ape apf apk apn apo app apr aps ar- ara are arf ark arn aro arp arr ars as- asa ase asf ask asn aso asp asr ass eaa eae eaf eak ean eao eap ear eas eea eee eef eek een eeo eep eer ees ef- efa efe eff efo efp efr efs eka eke ekf eko ekp ekr eks en- ena ene enf enk enn eno enp enr ens eo- eoa eoe eof eok eon eoo eop eor eos ep- epa epe epf epn epo epp epr eps era ere erf erk ern ero erp err ers es- esa ese esf esk esn eso esp esr ess faa fae faf fak fan fao fap far fas fea fee fef fek fen feo fep fer fes ffa ffe fff ffk ffn ffo ffp ffr ffs fka fkf fkk fkp fna fne fnf fnk fnn fnp fnr fns foa foe fof fok fon foo fop for fos fpa fpe fpk fpn fpo fpp fpr fps fra fre frf frk frn fro frp frr frs fsa fse fsf fsk fsn fso fsp fsr fss ka- kaa kae kaf kak kan kao kap kar kas ke- kea kee kef kek ken keo kep ker kes kfa kff kfo kfs kke kkk kkn kkp kkr kks kn- kna kne knf knk knn kno knp knr koa koe kof kok kon koo kop kor kos kpa kpe kpf kpk kpn kpo kpp kpr kps kra krf krk krn kro krp krr krs ksa kse ksf ksk ksn kso ksp ksr kss naa nae naf nak nan nao nap nar nas ne- nea nee nef nek nen neo nep ner nes nfa nfe nff nfk nfn nfo nfp nfr nfs nka nke nkf nkk nkn nko nkp nkr nks nna nne nnf nnk nnn nno nnp nns no- noa noe nof nok non noo nop nor nos npa npe npf npn npo npp npr nps nra nre nrf nrk nrn nro nrp nrr nrs nsa nse nsf nsk nsn nso nsp nsr nss oaa oae oaf oak oan oao oap oar oas oea oee oef oen oeo oep oer oes of- ofa ofe off ofn ofo ofp ofr ofs oka oke okk oko okp okr oks on- ona one onf onk onn ono onp onr ons oo- ooa oof ook oon ooo oop oor oos op- opa ope opf opk opn opo opp opr ops or- ora ore orf ork orn oro orp orr ors os- osa ose osf osk osn oso osp osr oss p-p paa pae paf pak pan pao pap par pas pea pee pef pek pen peo pep per pes pfa pfe pff pfk pfn pfo pfp pfr pfs pka pke pkf pkn pko pkp pkr pks pn- pna pne pnf pnk pnn pno pnp pnr pns poa poe pof pok pon poo pop por pos ppa ppe ppf ppk ppn ppo ppp ppr pps pra pre prf prk prn pro prp prr prs ps- psa pse psf psk psn pso psp psr pss ra- raa rae raf rak ran rao rap rar ras re- rea ree ref rek ren reo rep rer res rfa rfe rff rfk rfn rfo rfp rfr rfs rke rkf rkk rko rkp rks rna rnn rno rnp rnr rns roa roe rof rok ron roo rop ror ros rpa rpe rpf rpk rpn rpo rpp rpr rps rra rrf rrk rrn rrp rrr rrs rsa rse rsf rsk rsn rso rsp rsr rss saa sae saf sak san sao sap sar sas se- sea see sef sek sen seo sep ser ses sfa sfe sff sfk sfn sfo sfp sfr sfs sk- ska ske skf skk sko skp skr sks sna sne snf snk snn sno snp snr sns soa soe sof sok son soo sop sor sos spa spe spf spk spn spo spp spr sps sr- sra sre srf srk srn sro srp srr srs ss- ssa sse ssf ssk ssn sso ssp ssr sss