-er -ic c-- ccc cce ccf cch cci cck cco ccp ccr ce- cec cee cef ceh cei cek ceo cep cer cfc cfe cff cfh cfi cfk cfo cfp cfr ch- chc che chf chh chi chk cho chp chr ci- cic cie cif cih cii cik cio cip cir ckc ckh cki cko co- coc coe cof coh coi cok coo cop cor cpc cpe cpf cph cpi cpk cpo cpp cpr crc cre crf crh cri crk cro crp crr ec- ecc ece ecf ech eci eck eco ecr eec eee eef eek eeo eep eer ef- efc efe eff efh efi efo efp efr ehc ehe ehf ehh ehi eho ehp ehr eic eie eif eii eik eio eip eir ekc eke ekf ekh eki eko ekp ekr eo- eoc eoe eof eoh eoi eok eoo eop eor ep- epc epe epf eph epi epo epp epr erc ere erf erh eri erk ero erp err fcc fce fcf fci fck fco fcp fcr fec fee fef feh fei fek feo fep fer ffc ffe fff ffh ffi ffk ffo ffp ffr fhc fhe fhf fhh fhi fho fhp fhr fic fie fif fih fii fik fip fir fkc fkf fki fkk fkp foc foe fof foh foi fok foo fop for fpc fpe fph fpi fpk fpo fpp fpr frc fre frf frh fri frk fro frp frr h-i hcc hce hcf hch hci hck hco hcp hcr he- hec hee hef heh hei hek heo hep her hfc hfe hff hfh hfi hfk hfo hfp hfr hhc hhe hhf hhh hhi hhk hho hhp hhr hic hie hif hih hii hik hio hip hir hkf hkh hki hkk hko hkp hkr hoc hoe hof hoh hoi hok hoo hop hor hpc hpe hpf hph hpi hpk hpo hpp hpr hr- hrc hre hrf hrh hri hrk hro hrp hrr i-f icc ice icf ich ici ick ico icp icr ie- iec iee ief iei iek iep ier ifc ife iff ifi ifo ifp ifr ihc ihe ihf ihh ihi ihk iho ihp ihr iic iie iif iih iii iio iip iir ikc ike ikf iki ikk iko ikr io- ioc ioe iof ioh ioi ioo iop ior ipc ipe ipf ipi ipo ipp ipr ir- irc ire irf iri irk iro irp irr kcc kce kch kci kck kcp kcr ke- kec kee kef keh kei kek keo kep ker kfc kff kfh kfi kfo khe khf khh khi khk kho khr kic kie kif kih kii kik kio kip kir kkc kke kkh kki kkk kkp kkr koc koe kof koh koi kok koo kop kor kpc kpe kpf kph kpi kpk kpo kpp kpr krc krf kri krk kro krp krr o-i oc- occ ocf och oci ock oco ocp ocr oec oee oef oeh oei oeo oep oer of- ofc ofe off ofi ofo ofp ofr ohc ohe ohf ohh ohi oho ohp ohr oic oie oif oii oik oio oip oir okc oke oki okk oko okp okr oo- ooc oof ooh ooi ook ooo oop oor op- opc ope opf oph opi opk opo opp opr or- orc ore orf orh ori ork oro orp orr p-p pcc pce pcf pch pci pck pco pcp pcr pec pee pef peh pei pek peo pep per pfc pfe pff pfi pfk pfo pfp pfr phc phe phf phi phk pho php phr pic pie pif pih pii pik pio pip pir pkc pke pkf pki pko pkp pkr poc poe pof poh poi pok poo pop por ppc ppe ppf pph ppi ppk ppo ppp ppr prc pre prf prh pri prk pro prp prr rcc rce rcf rch rci rco rcp rcr re- rec ree ref reh rei rek reo rep rer rfc rfe rff rfh rfi rfk rfo rfp rfr rh- rhc rhe rhf rhh rhi rho rhp rhr ric rie rif rih rii rik rio rip rir rkc rke rkf rkk rko rkp roc roe rof roh roi rok roo rop ror rpc rpe rpf rph rpi rpk rpo rpp rpr rrc rrf rrh rri rrk rrp rrr