-er -ol c-- ccc ccd cce ccl cco ccp ccr ccs cdc cdd cde cdl cdo cdp cdr cds ce- cec ced cee cel ceo cep cer ces cl- clc cld cle cll clo clp clr cls co- coc cod coe col coo cop cor cos cpc cpd cpe cpl cpo cpp cpr cps crc crd cre crl cro crp crr crs csc csd cse csl cso csp csr css dcc dcd dce dcl dco dcp dcr dcs ddc ddd dde ddl ddo ddp ddr dds de- dec ded dee del deo dep der des dl- dlc dld dle dll dlo dlp dlr dls doc dod doe dol doo dop dor dos dpc dpd dpe dpl dpo dpp dpr dps drc drd dre drl dro drp drr drs dsc dsd dse dsl dso dsp dsr dss ec- ecc ecd ece ecl eco ecr ecs ed- edc edd ede edl edo edp edr eds eec eed eee eel eeo eep eer ees elc eld ele ell elo elp elr els eo- eoc eod eoe eol eoo eop eor eos ep- epc epd epe epl epo epp epr eps erc erd ere erl ero erp err ers es- esc esd ese esl eso esp esr ess l-p lcc lcd lce lcl lco lcp lcr lcs ldc ldd lde ldl ldo ldp ldr lds lec led lee lel leo lep ler les llc lld lle lll llo llp llr lls loc lod loe lol loo lop lor los lpc lpd lpe lpl lpo lpp lpr lps lrc lrd lro lrp lrr lrs lsc lsd lse lsl lso lsp lsr lss oc- occ ocd ocl oco ocp ocr ocs odc odd ode odl odo odp odr ods oec oed oee oel oeo oep oer oes olc old ole oll olo olp ols oo- ooc ood ool ooo oop oor oos op- opc opd ope opl opo opp opr ops or- orc ord ore orl oro orp orr ors os- osc osd ose osl oso osp osr oss p-p pcc pcd pce pcl pco pcp pcr pcs pdc pdd pde pdl pdo pdp pdr pds pec ped pee pel peo pep per pes plc pld ple pll plo plp plr pls poc pod poe pol poo pop por pos ppc ppd ppe ppl ppo ppp ppr pps prc prd pre prl pro prp prr prs ps- psc psd pse psl pso psp psr pss rcc rcd rce rcl rco rcp rcr rcs rdc rdd rde rdl rdo rdp rdr rds re- rec red ree rel reo rep rer res rlc rld rle rll rlo rlp rlr rls roc rod roe rol roo rop ror ros rpc rpd rpe rpl rpo rpp rpr rps rrc rrd rrl rrp rrr rrs rsc rsd rse rsl rso rsp rsr rss scc scd sce scl sco scp scr scs sdc sdd sde sdl sdo sdp sdr sds se- sec sed see sel seo sep ser ses slc sld sle sll slo slp slr sls soc sod soe sol soo sop sor sos spc spd spe spl spo spp spr sps sr- src srd sre srl sro srp srr srs ss- ssc ssd sse ssl sso ssp ssr sss