-er a-a a-i aaa aae aaf aai aak aao aar aas aea aee aef aei aek aeo aer aes af- afa afe aff afi afk afo afr afs ai- aia aie aif aii aik aio air ais aka ake aki akk ako akr aks aoa aoe aof aoi aok aoo aor aos ar- ara are arf ari ark aro arr ars as- asa ase asf asi ask aso asr ass eaa eae eaf eai eak eao ear eas eea eee eef eek eeo eer ees ef- efa efe eff efi efo efr efs eia eie eif eii eik eio eir eis eka eke ekf eki eko ekr eks eo- eoa eoe eof eoi eok eoo eor eos era ere erf eri erk ero err ers es- esa ese esf esi esk eso esr ess faa fae faf fai fak fao far fas fea fee fef fei fek feo fer fes ffa ffe fff ffi ffk ffo ffr ffs fia fie fif fii fik fir fis fka fkf fki fkk foa foe fof foi fok foo for fos fra fre frf fri frk fro frr frs fsa fse fsf fsi fsk fso fsr fss i-f ia- iaa iae iaf iai iao iar ias ie- iea iee ief iei iek ier ies ifa ife iff ifi ifo ifr ifs iia iie iif iii iio iir iis ika ike ikf iki ikk iko ikr iks io- ioa ioe iof ioi ioo ior ios ir- ira ire irf iri irk iro irr irs is- isa ise isf isi isk iso isr iss ka- kaa kae kaf kai kak kao kar kas ke- kea kee kef kei kek keo ker kes kfa kff kfi kfo kfs kia kie kif kii kik kio kir kis kke kki kkk kkr kks koa koe kof koi kok koo kor kos kra krf kri krk kro krr krs ksa kse ksf ksi ksk kso ksr kss o-i oaa oae oaf oai oak oao oar oas oea oee oef oei oeo oer oes of- ofa ofe off ofi ofo ofr ofs oia oie oif oii oik oio oir ois oka oke oki okk oko okr oks oo- ooa oof ooi ook ooo oor oos or- ora ore orf ori ork oro orr ors os- osa ose osf osi osk oso osr oss ra- raa rae raf rai rak rao rar ras re- rea ree ref rei rek reo rer res rfa rfe rff rfi rfk rfo rfr rfs ria rie rif rii rik rio rir ris rke rkf rkk rko rks roa roe rof roi rok roo ror ros rra rrf rri rrk rrr rrs rsa rse rsf rsi rsk rso rsr rss saa sae saf sai sak sao sar sas se- sea see sef sei sek seo ser ses sfa sfe sff sfi sfk sfo sfr sfs sia sie sif sii sik sio sir sis sk- ska ske skf ski skk sko skr sks soa soe sof soi sok soo sor sos sr- sra sre srf sri srk sro srr srs ss- ssa sse ssf ssi ssk sso ssr sss