-er a-a a-c aaa aac aad aae aak aam aao aar ac- aca acc acd ace ack acm aco acr ad- ada adc add ade adk adm ado adr aea aec aed aee aek aem aeo aer aka akc akd ake akk akm ako akr ama amc amd ame amk amm amo amr aoa aoc aod aoe aok aom aoo aor ar- ara arc ard are ark arm aro arr c-- caa cac cad cae cak cam cao car cca ccc ccd cce cck ccm cco ccr cda cdc cdd cde cdk cdm cdo cdr ce- cea cec ced cee cek cem ceo cer cka ckc ckd ckm cko cma cmc cmd cme cmk cmm cmo cmr co- coa coc cod coe cok com coo cor cra crc crd cre crk crm cro crr daa dac dad dae dak dam dao dar dca dcc dcd dce dck dcm dco dcr dda ddc ddd dde ddk ddm ddo ddr de- dea dec ded dee dek dem deo der dka dkc dke dkk dkm dko dkr dma dmc dmd dme dmk dmm dmo dmr doa doc dod doe dok dom doo dor dra drc drd dre drk drm dro drr eaa eac ead eae eak eam eao ear ec- eca ecc ecd ece eck ecm eco ecr ed- eda edc edd ede edk edm edo edr eea eec eed eee eek eem eeo eer eka ekc ekd eke eko ekr em- ema emc emd eme emk emm emo emr eo- eoa eoc eod eoe eok eom eoo eor era erc erd ere erk erm ero err ka- kaa kac kad kae kak kam kao kar kca kcc kcd kce kck kcm kcr kda kdc kde kdk kdm kdo kdr ke- kea kec ked kee kek kem keo ker kkc kke kkk kkm kkr kma kmc kmd kme kmk kmm kmo koa koc kod koe kok kom koo kor kra krc krd krk kro krr m-o m-r maa mac mad mae mak mam mao mar mc- mca mcc mcd mce mck mcm mco mcr mda mdc mdd mde mdk mdm mdo mdr mea mec med mee mek mem meo mer mka mkc mkd mke mkk mkm mko mkr mma mmc mmd mme mmk mmm mmo mmr moa moc mod moe mok mom moo mor mra mrc mrd mre mrk mrm mro mrr oaa oac oad oae oak oam oao oar oc- oca occ ocd ock ocm oco ocr oda odc odd ode odm odo odr oea oec oed oee oem oeo oer oka okc okd oke okk oko okr om- oma omc omd ome omm omo omr oo- ooa ooc ood ook oom ooo oor or- ora orc ord ore ork orm oro orr ra- raa rac rad rae rak ram rao rar rca rcc rcd rce rcm rco rcr rda rdc rdd rde rdm rdo rdr re- rea rec red ree rek rem reo rer rkc rke rkk rkm rko rma rmc rmd rme rmm rmo rmr roa roc rod roe rok rom roo ror rra rrc rrd rrk rrm rrr