-er a-a aaa aad aae aak aao aar aas ad- ada add ade adk ado adr ads aea aed aee aek aeo aer aes aka akd ake akk ako akr aks aoa aod aoe aok aoo aor aos ar- ara ard are ark aro arr ars as- asa asd ase ask aso asr ass daa dad dae dak dao dar das dda ddd dde ddk ddo ddr dds de- dea ded dee dek deo der des dka dke dkk dko dkr dks doa dod doe dok doo dor dos dra drd dre drk dro drr drs dsa dsd dse dsk dso dsr dss eaa ead eae eak eao ear eas ed- eda edd ede edk edo edr eds eea eed eee eek eeo eer ees eka ekd eke eko ekr eks eo- eoa eod eoe eok eoo eor eos era erd ere erk ero err ers es- esa esd ese esk eso esr ess ka- kaa kad kae kak kao kar kas kda kde kdk kdo kdr kds ke- kea ked kee kek keo ker kes kke kkk kkr kks koa kod koe kok koo kor kos kra krd krk kro krr krs ksa ksd kse ksk kso ksr kss oaa oad oae oak oao oar oas oda odd ode odo odr ods oea oed oee oeo oer oes oka okd oke okk oko okr oks oo- ooa ood ook ooo oor oos or- ora ord ore ork oro orr ors os- osa osd ose osk oso osr oss ra- raa rad rae rak rao rar ras rda rdd rde rdo rdr rds re- rea red ree rek reo rer res rke rkk rko rks roa rod roe rok roo ror ros rra rrd rrk rrr rrs rsa rsd rse rsk rso rsr rss saa sad sae sak sao sar sas sda sdd sde sdk sdo sdr sds se- sea sed see sek seo ser ses sk- ska skd ske skk sko skr sks soa sod soe sok soo sor sos sr- sra srd sre srk sro srr srs ss- ssa ssd sse ssk sso ssr sss