-er a-a aaa aae aak aan aao aar aas aea aee aek aen aeo aer aes aka ake akk akn ako akr aks an- ana ane ank ann ano anr ans aoa aoe aok aon aoo aor aos ar- ara are ark arn aro arr ars as- asa ase ask asn aso asr ass eaa eae eak ean eao ear eas eea eee eek een eeo eer ees eka eke eko ekr eks en- ena ene enk enn eno enr ens eo- eoa eoe eok eon eoo eor eos era ere erk ern ero err ers es- esa ese esk esn eso esr ess ka- kaa kae kak kan kao kar kas ke- kea kee kek ken keo ker kes kke kkk kkn kkr kks kn- kna kne knk knn kno knr koa koe kok kon koo kor kos kra krk krn kro krr krs ksa kse ksk ksn kso ksr kss naa nae nak nan nao nar nas ne- nea nee nek nen neo ner nes nka nke nkk nkn nko nkr nks nna nne nnk nnn nno nns no- noa noe nok non noo nor nos nra nre nrk nrn nro nrr nrs nsa nse nsk nsn nso nsr nss oaa oae oak oan oao oar oas oea oee oen oeo oer oes oka oke okk oko okr oks on- ona one onk onn ono onr ons oo- ooa ook oon ooo oor oos or- ora ore ork orn oro orr ors os- osa ose osk osn oso osr oss ra- raa rae rak ran rao rar ras re- rea ree rek ren reo rer res rke rkk rko rks rna rnn rno rnr rns roa roe rok ron roo ror ros rra rrk rrn rrr rrs rsa rse rsk rsn rso rsr rss saa sae sak san sao sar sas se- sea see sek sen seo ser ses sk- ska ske skk sko skr sks sna sne snk snn sno snr sns soa soe sok son soo sor sos sr- sra sre srk srn sro srr srs ss- ssa sse ssk ssn sso ssr sss