-er -ic c-- ccc cce cci cck cco ccp ccr ccv ce- cec cee cei cek ceo cep cer cev ci- cic cie cii cik cio cip cir civ ckc cki cko co- coc coe coi cok coo cop cor cov cpc cpe cpi cpk cpo cpp cpr cpv crc cre cri crk cro crp crr crv cvc cve cvi cvk cvo cvp cvr cvv ec- ecc ece eci eck eco ecr ecv eec eee eek eeo eep eer eev eic eie eii eik eio eip eir eiv ekc eke eki eko ekp ekr ekv eo- eoc eoe eoi eok eoo eop eor ep- epc epe epi epo epp epr erc ere eri erk ero erp err erv evc eve evi evo evp evr evv i-v icc ice ici ick ico icp icr icv ie- iec iee iei iek iep ier iev iic iie iii iio iip iir ikc ike iki ikk iko ikr ikv io- ioc ioe ioi ioo iop ior iov ipc ipe ipi ipo ipp ipr ipv ir- irc ire iri irk iro irp irr irv ivc ive ivi ivo ivp ivr ivv kcc kce kci kck kcp kcr ke- kec kee kei kek keo kep ker kev kic kie kii kik kio kip kir kiv kkc kke kki kkk kkp kkr kkv koc koe koi kok koo kop kor kpc kpe kpi kpk kpo kpp kpr kpv krc kri krk kro krp krr krv kvi kvk kvo kvp kvr kvv o-i oc- occ oci ock oco ocp ocr ocv oec oee oei oeo oep oer oic oie oii oik oio oip oir oiv okc oke oki okk oko okp okr oo- ooc ooi ook ooo oop oor oov op- opc ope opi opk opo opp opr opv or- orc ore ori ork oro orp orr orv ov- ovc ove ovi ovo ovp ovv p-p pcc pce pci pck pco pcp pcr pcv pec pee pei pek peo pep per pev pic pie pii pik pio pip pir piv pkc pke pki pko pkp pkr poc poe poi pok poo pop por pov ppc ppe ppi ppk ppo ppp ppr ppv prc pre pri prk pro prp prr prv pvc pve pvi pvk pvo pvp pvr pvv rcc rce rci rco rcp rcr rcv re- rec ree rei rek reo rep rer rev ric rie rii rik rio rip rir riv rkc rke rkk rko rkp rkv roc roe roi rok roo rop ror rov rpc rpe rpi rpk rpo rpp rpr rpv rrc rri rrk rrp rrr rvc rve rvi rvo rvp rvr rvv v-e vcc vce vci vco vcp vcr vec vee vei vek veo vep ver vi- vic vie vii vik vio vip vir viv vkp voc voe voi vok voo vop vor vov vpc vpe vpi vpk vpo vpp vpr vrc vre vri vrk vrp vrr vvc vvi vvo vvr vvv