-er -ic c-- ccc ccd cce cci cck cco ccp ccr ccv cdc cdd cde cdi cdk cdo cdp cdr cdv ce- cec ced cee cei cek ceo cep cer cev ci- cic cid cie cii cik cio cip cir civ ckc ckd cki cko co- coc cod coe coi cok coo cop cor cov cpc cpd cpe cpi cpk cpo cpp cpr cpv crc crd cre cri crk cro crp crr crv cvc cvd cve cvi cvk cvo cvp cvr cvv dcc dcd dce dci dck dco dcp dcr dcv ddc ddd dde ddi ddk ddo ddp ddr de- dec ded dee dei dek deo dep der dev di- dic did die dii dik dio dip dir div dkc dke dki dkk dko dkp dkr doc dod doe doi dok doo dop dor dov dpc dpd dpe dpi dpk dpo dpp dpr dpv drc drd dre dri drk dro drp drr drv dvc dvd dve dvi dvk dvp dvr ec- ecc ecd ece eci eck eco ecr ecv ed- edc edd ede edi edk edo edp edr eec eed eee eek eeo eep eer eev eic eid eie eii eik eio eip eir eiv ekc ekd eke eki eko ekp ekr ekv eo- eoc eod eoe eoi eok eoo eop eor ep- epc epd epe epi epo epp epr erc erd ere eri erk ero erp err erv evc evd eve evi evo evp evr evv i-d i-v icc icd ice ici ick ico icp icr icv idc idd ide idi idk ido idp idr idv ie- iec ied iee iei iek iep ier iev iic iid iie iii iio iip iir ikc ike iki ikk iko ikr ikv io- ioc iod ioe ioi ioo iop ior iov ipc ipd ipe ipi ipo ipp ipr ipv ir- irc ird ire iri irk iro irp irr irv ivc ivd ive ivi ivo ivp ivr ivv kcc kcd kce kci kck kcp kcr kdc kde kdk kdo kdp kdr ke- kec ked kee kei kek keo kep ker kev kic kid kie kii kik kio kip kir kiv kkc kke kki kkk kkp kkr kkv koc kod koe koi kok koo kop kor kpc kpd kpe kpi kpk kpo kpp kpr kpv krc krd kri krk kro krp krr krv kvi kvk kvo kvp kvr kvv o-i oc- occ ocd oci ock oco ocp ocr ocv odc odd ode odi odo odp odr odv oec oed oee oei oeo oep oer oic oid oie oii oik oio oip oir oiv okc okd oke oki okk oko okp okr oo- ooc ood ooi ook ooo oop oor oov op- opc opd ope opi opk opo opp opr opv or- orc ord ore ori ork oro orp orr orv ov- ovc ovd ove ovi ovo ovp ovv p-p pcc pcd pce pci pck pco pcp pcr pcv pdc pdd pde pdi pdk pdo pdp pdr pdv pec ped pee pei pek peo pep per pev pic pid pie pii pik pio pip pir piv pkc pkd pke pki pko pkp pkr poc pod poe poi pok poo pop por pov ppc ppd ppe ppi ppk ppo ppp ppr ppv prc prd pre pri prk pro prp prr prv pvc pvd pve pvi pvk pvo pvp pvr pvv rcc rcd rce rci rco rcp rcr rcv rdc rdd rde rdi rdo rdp rdr rdv re- rec red ree rei rek reo rep rer rev ric rid rie rii rik rio rip rir riv rkc rke rkk rko rkp rkv roc rod roe roi rok roo rop ror rov rpc rpd rpe rpi rpk rpo rpp rpr rpv rrc rrd rri rrk rrp rrr rvc rvd rve rvi rvo rvp rvr rvv v-e vcc vcd vce vci vco vcp vcr vdc vdd vde vdi vdk vdo vdp vdr vdv vec ved vee vei vek veo vep ver vi- vic vid vie vii vik vio vip vir viv vkp voc vod voe voi vok voo vop vor vov vpc vpd vpe vpi vpk vpo vpp vpr vrc vrd vre vri vrk vrp vrr vvc vvi vvo vvr vvv