-er a-a aaa aad aae aag aak aao aar ad- ada add ade adg adk ado adr aea aed aee aeg aek aeo aer ag- aga agd age agg agk ago agr aka akd ake akg akk ako akr aoa aod aoe aog aok aoo aor ar- ara ard are arg ark aro arr daa dad dae dag dak dao dar dda ddd dde ddg ddk ddo ddr de- dea ded dee deg dek deo der dga dgd dge dgg dgk dgr dka dke dkg dkk dko dkr doa dod doe dog dok doo dor dra drd dre drg drk dro drr eaa ead eae eag eak eao ear ed- eda edd ede edg edk edo edr eea eed eee eeg eek eeo eer ega egd ege egg ego egr eka ekd eke ekg eko ekr eo- eoa eod eoe eog eok eoo eor era erd ere erg erk ero err g-d gaa gad gae gag gak gao gar gda gdd gde gdk gdo gdr ge- gea ged gee geg gek geo ger gga ggd ggg ggo ggr gka gkd gko goa god goe gog gok goo gor gra grd gre grg grk gro grr ka- kaa kad kae kag kak kao kar kda kde kdg kdk kdo kdr ke- kea ked kee keg kek keo ker kga kgd kgo kke kkk kkr koa kod koe kog kok koo kor kra krd krg krk kro krr oaa oad oae oag oak oao oar oda odd ode odg odo odr oea oed oee oeg oeo oer oga ogd oge ogg ogo oka okd oke okg okk oko okr oo- ooa ood oog ook ooo oor or- ora ord ore org ork oro orr ra- raa rad rae rag rak rao rar rda rdd rde rdg rdo rdr re- rea red ree reg rek reo rer rga rgd rge rgg rgk rgo rgr rke rkg rkk rko roa rod roe rog rok roo ror rra rrd rrg rrk rrr