a-a a-c aaa aac aad aaf aak aam aao aar ac- aca acc acd acf ack acm aco acr ad- ada adc add adf adk adm ado adr af- afa afc afd aff afk afm afo afr aka akc akd akk akm ako akr ama amc amd amf amk amm amo amr aoa aoc aod aof aok aom aoo aor ar- ara arc ard arf ark arm aro arr c-- caa cac cad caf cak cam cao car cca ccc ccd ccf cck ccm cco ccr cda cdc cdd cdf cdk cdm cdo cdr cfa cfc cfd cff cfk cfm cfo cfr cka ckc ckd ckm cko cma cmc cmd cmf cmk cmm cmo cmr co- coa coc cod cof cok com coo cor cra crc crd crf crk crm cro crr daa dac dad daf dak dam dao dar dca dcc dcd dcf dck dcm dco dcr dda ddc ddd ddf ddk ddm ddo ddr dfa dfc dfd dff dfk dfm dfo dfr dka dkc dkk dkm dko dkr dma dmc dmd dmf dmk dmm dmo dmr doa doc dod dof dok dom doo dor dra drc drd drk drm dro drr faa fac fad faf fak fam fao far fca fcc fcd fcf fck fcm fco fcr fda fdc fdd fdf fdk fdm fdo fdr ffa ffc ffd fff ffk ffm ffo ffr fka fkc fkf fkk fkm fma fmc fmd fmf fmm fmo fmr foa foc fof fok fom foo for fra frc frd frf frk frm fro frr ka- kaa kac kad kaf kak kam kao kar kca kcc kcd kck kcm kcr kda kdc kdf kdk kdm kdo kdr kfa kfc kfd kff kfm kfo kkc kkk kkm kkr kma kmc kmd kmf kmk kmm kmo koa koc kod kof kok kom koo kor kra krc krd krf krk kro krr m-f m-o m-r maa mac mad maf mak mam mao mar mc- mca mcc mcd mcf mck mcm mco mcr mda mdc mdd mdf mdk mdm mdo mdr mfa mfc mfd mff mfm mfo mfr mka mkc mkd mkk mkm mko mkr mma mmc mmd mmf mmk mmm mmo mmr moa moc mod mof mok mom moo mor mra mrc mrd mrf mrk mrm mro mrr oaa oac oad oaf oak oam oao oar oc- oca occ ocd ocf ock ocm oco ocr oda odc odd odf odm odo odr of- ofa ofc ofd off ofm ofo ofr oka okc okd okk oko okr om- oma omc omd omf omm omo omr oo- ooa ooc ood oof ook oom ooo oor or- ora orc ord orf ork orm oro orr ra- raa rac rad raf rak ram rao rar rca rcc rcd rcf rcm rco rcr rda rdc rdd rdf rdm rdo rdr rfa rfc rfd rff rfk rfm rfo rfr rkc rkf rkk rkm rko rma rmc rmd rmf rmm rmo rmr roa roc rod rof rok rom roo ror rra rrc rrd rrf rrk rrm rrr