-er a-a a-c aaa aac aad aae aao aap aar aas ac- aca acc acd ace aco acp acr acs ad- ada adc add ade ado adp adr ads aea aec aed aee aeo aep aer aes aoa aoc aod aoe aoo aop aor aos ap- apa apc apd ape apo app apr aps ar- ara arc ard are aro arp arr ars as- asa asc asd ase aso asp asr ass c-- caa cac cad cae cao cap car cas cca ccc ccd cce cco ccp ccr ccs cda cdc cdd cde cdo cdp cdr cds ce- cea cec ced cee ceo cep cer ces co- coa coc cod coe coo cop cor cos cpa cpc cpd cpe cpo cpp cpr cps cra crc crd cre cro crp crr crs csa csc csd cse cso csp csr css daa dac dad dae dao dap dar das dca dcc dcd dce dco dcp dcr dcs dda ddc ddd dde ddo ddp ddr dds de- dea dec ded dee deo dep der des doa doc dod doe doo dop dor dos dpa dpc dpd dpe dpo dpp dpr dps dra drc drd dre dro drp drr drs dsa dsc dsd dse dso dsp dsr dss eaa eac ead eae eao eap ear eas ec- eca ecc ecd ece eco ecr ecs ed- eda edc edd ede edo edp edr eds eea eec eed eee eeo eep eer ees eo- eoa eoc eod eoe eoo eop eor eos ep- epa epc epd epe epo epp epr eps era erc erd ere ero erp err ers es- esa esc esd ese eso esp esr ess oaa oac oad oae oao oap oar oas oc- oca occ ocd oco ocp ocr ocs oda odc odd ode odo odp odr ods oea oec oed oee oeo oep oer oes oo- ooa ooc ood ooo oop oor oos op- opa opc opd ope opo opp opr ops or- ora orc ord ore oro orp orr ors os- osa osc osd ose oso osp osr oss p-p paa pac pad pae pao pap par pas pca pcc pcd pce pco pcp pcr pcs pda pdc pdd pde pdo pdp pdr pds pea pec ped pee peo pep per pes poa poc pod poe poo pop por pos ppa ppc ppd ppe ppo ppp ppr pps pra prc prd pre pro prp prr prs ps- psa psc psd pse pso psp psr pss ra- raa rac rad rae rao rap rar ras rca rcc rcd rce rco rcp rcr rcs rda rdc rdd rde rdo rdp rdr rds re- rea rec red ree reo rep rer res roa roc rod roe roo rop ror ros rpa rpc rpd rpe rpo rpp rpr rps rra rrc rrd rrp rrr rrs rsa rsc rsd rse rso rsp rsr rss saa sac sad sae sao sap sar sas sca scc scd sce sco scp scr scs sda sdc sdd sde sdo sdp sdr sds se- sea sec sed see seo sep ser ses soa soc sod soe soo sop sor sos spa spc spd spe spo spp spr sps sr- sra src srd sre sro srp srr srs ss- ssa ssc ssd sse sso ssp ssr sss