-er a-a a-c aaa aac aad aae aam aao aap aar ac- aca acc acd ace acm aco acp acr ad- ada adc add ade adm ado adp adr aea aec aed aee aem aeo aep aer ama amc amd ame amm amo amp amr aoa aoc aod aoe aom aoo aop aor ap- apa apc apd ape apm apo app apr ar- ara arc ard are arm aro arp arr c-- caa cac cad cae cam cao cap car cca ccc ccd cce ccm cco ccp ccr cda cdc cdd cde cdm cdo cdp cdr ce- cea cec ced cee cem ceo cep cer cma cmc cmd cme cmm cmo cmp cmr co- coa coc cod coe com coo cop cor cpa cpc cpd cpe cpm cpo cpp cpr cra crc crd cre crm cro crp crr daa dac dad dae dam dao dap dar dca dcc dcd dce dcm dco dcp dcr dda ddc ddd dde ddm ddo ddp ddr de- dea dec ded dee dem deo dep der dma dmc dmd dme dmm dmo dmp dmr doa doc dod doe dom doo dop dor dpa dpc dpd dpe dpm dpo dpp dpr dra drc drd dre drm dro drp drr eaa eac ead eae eam eao eap ear ec- eca ecc ecd ece ecm eco ecr ed- eda edc edd ede edm edo edp edr eea eec eed eee eem eeo eep eer em- ema emc emd eme emm emo emp emr eo- eoa eoc eod eoe eom eoo eop eor ep- epa epc epd epe epm epo epp epr era erc erd ere erm ero erp err m-o m-r maa mac mad mae mam mao map mar mc- mca mcc mcd mce mcm mco mcp mcr mda mdc mdd mde mdm mdo mdp mdr mea mec med mee mem meo mep mer mma mmc mmd mme mmm mmo mmp mmr moa moc mod moe mom moo mop mor mpa mpc mpd mpe mpm mpo mpp mpr mra mrc mrd mre mrm mro mrp mrr oaa oac oad oae oam oao oap oar oc- oca occ ocd ocm oco ocp ocr oda odc odd ode odm odo odp odr oea oec oed oee oem oeo oep oer om- oma omc omd ome omm omo omp omr oo- ooa ooc ood oom ooo oop oor op- opa opc opd ope opm opo opp opr or- ora orc ord ore orm oro orp orr p-p paa pac pad pae pam pao pap par pca pcc pcd pce pcm pco pcp pcr pda pdc pdd pde pdm pdo pdp pdr pea pec ped pee pem peo pep per pma pmc pmd pme pmm pmo pmp pmr poa poc pod poe pom poo pop por ppa ppc ppd ppe ppm ppo ppp ppr pra prc prd pre prm pro prp prr ra- raa rac rad rae ram rao rap rar rca rcc rcd rce rcm rco rcp rcr rda rdc rdd rde rdm rdo rdp rdr re- rea rec red ree rem reo rep rer rma rmc rmd rme rmm rmo rmp rmr roa roc rod roe rom roo rop ror rpa rpc rpd rpe rpm rpo rpp rpr rra rrc rrd rrm rrp rrr