-er c-- ccc ccd cce cco ccp ccr ccs ccv cdc cdd cde cdo cdp cdr cds cdv ce- cec ced cee ceo cep cer ces cev co- coc cod coe coo cop cor cos cov cpc cpd cpe cpo cpp cpr cps cpv crc crd cre cro crp crr crs crv csc csd cse cso csp csr css csv cvc cvd cve cvo cvp cvr cvs cvv dcc dcd dce dco dcp dcr dcs dcv ddc ddd dde ddo ddp ddr dds de- dec ded dee deo dep der des dev doc dod doe doo dop dor dos dov dpc dpd dpe dpo dpp dpr dps dpv drc drd dre dro drp drr drs drv dsc dsd dse dso dsp dsr dss dsv dvc dvd dve dvp dvr dvs ec- ecc ecd ece eco ecr ecs ecv ed- edc edd ede edo edp edr eds eec eed eee eeo eep eer ees eev eo- eoc eod eoe eoo eop eor eos ep- epc epd epe epo epp epr eps erc erd ere ero erp err ers erv es- esc esd ese eso esp esr ess esv evc evd eve evo evp evr evs evv oc- occ ocd oco ocp ocr ocs ocv odc odd ode odo odp odr ods odv oec oed oee oeo oep oer oes oo- ooc ood ooo oop oor oos oov op- opc opd ope opo opp opr ops opv or- orc ord ore oro orp orr ors orv os- osc osd ose oso osp osr oss osv ov- ovc ovd ove ovo ovp ovs ovv p-p pcc pcd pce pco pcp pcr pcs pcv pdc pdd pde pdo pdp pdr pds pdv pec ped pee peo pep per pes pev poc pod poe poo pop por pos pov ppc ppd ppe ppo ppp ppr pps ppv prc prd pre pro prp prr prs prv ps- psc psd pse pso psp psr pss psv pvc pvd pve pvo pvp pvr pvs pvv rcc rcd rce rco rcp rcr rcs rcv rdc rdd rde rdo rdp rdr rds rdv re- rec red ree reo rep rer res rev roc rod roe roo rop ror ros rov rpc rpd rpe rpo rpp rpr rps rpv rrc rrd rrp rrr rrs rsc rsd rse rso rsp rsr rss rsv rvc rvd rve rvo rvp rvr rvs rvv scc scd sce sco scp scr scs scv sdc sdd sde sdo sdp sdr sds sdv se- sec sed see seo sep ser ses sev soc sod soe soo sop sor sos sov spc spd spe spo spp spr sps spv sr- src srd sre sro srp srr srs srv ss- ssc ssd sse sso ssp ssr sss ssv svc svd sve svo svp svr svs svv v-e vcc vcd vce vco vcp vcr vcs vdc vdd vde vdo vdp vdr vds vdv vec ved vee veo vep ver ves voc vod voe voo vop vor vos vov vpc vpd vpe vpo vpp vpr vps vrc vrd vre vrp vrr vrs vsc vsd vse vso vsp vsr vss vsv vvc vvo vvr vvs vvv