a-a a-c aaa aac aad aao aap aar aas ac- aca acc acd aco acp acr acs ad- ada adc add ado adp adr ads aoa aoc aod aoo aop aor aos ap- apa apc apd apo app apr aps ar- ara arc ard aro arp arr ars as- asa asc asd aso asp asr ass c-- caa cac cad cao cap car cas cca ccc ccd cco ccp ccr ccs cda cdc cdd cdo cdp cdr cds co- coa coc cod coo cop cor cos cpa cpc cpd cpo cpp cpr cps cra crc crd cro crp crr crs csa csc csd cso csp csr css daa dac dad dao dap dar das dca dcc dcd dco dcp dcr dcs dda ddc ddd ddo ddp ddr dds doa doc dod doo dop dor dos dpa dpc dpd dpo dpp dpr dps dra drc drd dro drp drr drs dsa dsc dsd dso dsp dsr dss oaa oac oad oao oap oar oas oc- oca occ ocd oco ocp ocr ocs oda odc odd odo odp odr ods oo- ooa ooc ood ooo oop oor oos op- opa opc opd opo opp opr ops or- ora orc ord oro orp orr ors os- osa osc osd oso osp osr oss p-p paa pac pad pao pap par pas pca pcc pcd pco pcp pcr pcs pda pdc pdd pdo pdp pdr pds poa poc pod poo pop por pos ppa ppc ppd ppo ppp ppr pps pra prc prd pro prp prr prs ps- psa psc psd pso psp psr pss ra- raa rac rad rao rap rar ras rca rcc rcd rco rcp rcr rcs rda rdc rdd rdo rdp rdr rds roa roc rod roo rop ror ros rpa rpc rpd rpo rpp rpr rps rra rrc rrd rrp rrr rrs rsa rsc rsd rso rsp rsr rss saa sac sad sao sap sar sas sca scc scd sco scp scr scs sda sdc sdd sdo sdp sdr sds soa soc sod soo sop sor sos spa spc spd spo spp spr sps sr- sra src srd sro srp srr srs ss- ssa ssc ssd sso ssp ssr sss