-er c-- ccc ccd cce cco ccp ccr ccv cdc cdd cde cdo cdp cdr cdv ce- cec ced cee ceo cep cer cev co- coc cod coe coo cop cor cov cpc cpd cpe cpo cpp cpr cpv crc crd cre cro crp crr crv cvc cvd cve cvo cvp cvr cvv dcc dcd dce dco dcp dcr dcv ddc ddd dde ddo ddp ddr de- dec ded dee deo dep der dev doc dod doe doo dop dor dov dpc dpd dpe dpo dpp dpr dpv drc drd dre dro drp drr drv dvc dvd dve dvp dvr ec- ecc ecd ece eco ecr ecv ed- edc edd ede edo edp edr eec eed eee eeo eep eer eev eo- eoc eod eoe eoo eop eor ep- epc epd epe epo epp epr erc erd ere ero erp err erv evc evd eve evo evp evr evv oc- occ ocd oco ocp ocr ocv odc odd ode odo odp odr odv oec oed oee oeo oep oer oo- ooc ood ooo oop oor oov op- opc opd ope opo opp opr opv or- orc ord ore oro orp orr orv ov- ovc ovd ove ovo ovp ovv p-p pcc pcd pce pco pcp pcr pcv pdc pdd pde pdo pdp pdr pdv pec ped pee peo pep per pev poc pod poe poo pop por pov ppc ppd ppe ppo ppp ppr ppv prc prd pre pro prp prr prv pvc pvd pve pvo pvp pvr pvv rcc rcd rce rco rcp rcr rcv rdc rdd rde rdo rdp rdr rdv re- rec red ree reo rep rer rev roc rod roe roo rop ror rov rpc rpd rpe rpo rpp rpr rpv rrc rrd rrp rrr rvc rvd rve rvo rvp rvr rvv v-e vcc vcd vce vco vcp vcr vdc vdd vde vdo vdp vdr vdv vec ved vee veo vep ver voc vod voe voo vop vor vov vpc vpd vpe vpo vpp vpr vrc vrd vre vrp vrr vvc vvo vvr vvv