-er -ic c-- ccc cce ccf cch cci cck cco ccp ccr ccs ce- cec cee cef ceh cei cek ceo cep cer ces cfc cfe cff cfh cfi cfk cfo cfp cfr cfs ch- chc che chf chh chi chk cho chp chr chs ci- cic cie cif cih cii cik cio cip cir cis ckc ckh cki cko cks co- coc coe cof coh coi cok coo cop cor cos cpc cpe cpf cph cpi cpk cpo cpp cpr cps crc cre crf crh cri crk cro crp crr crs csc cse csf csh csi csk cso csp csr css ec- ecc ece ecf ech eci eck eco ecr ecs eec eee eef eek eeo eep eer ees ef- efc efe eff efh efi efo efp efr efs ehc ehe ehf ehh ehi eho ehp ehr ehs eic eie eif eii eik eio eip eir eis ekc eke ekf ekh eki eko ekp ekr eks eo- eoc eoe eof eoh eoi eok eoo eop eor eos ep- epc epe epf eph epi epo epp epr eps erc ere erf erh eri erk ero erp err ers es- esc ese esf esh esi esk eso esp esr ess fcc fce fcf fci fck fco fcp fcr fcs fec fee fef feh fei fek feo fep fer fes ffc ffe fff ffh ffi ffk ffo ffp ffr ffs fhc fhe fhf fhh fhi fho fhp fhr fhs fic fie fif fih fii fik fip fir fis fkc fkf fki fkk fkp foc foe fof foh foi fok foo fop for fos fpc fpe fph fpi fpk fpo fpp fpr fps frc fre frf frh fri frk fro frp frr frs fsc fse fsf fsh fsi fsk fso fsp fsr fss h-i hcc hce hcf hch hci hck hco hcp hcr hcs he- hec hee hef heh hei hek heo hep her hes hfc hfe hff hfh hfi hfk hfo hfp hfr hfs hhc hhe hhf hhh hhi hhk hho hhp hhr hhs hic hie hif hih hii hik hio hip hir his hkf hkh hki hkk hko hkp hkr hks hoc hoe hof hoh hoi hok hoo hop hor hos hpc hpe hpf hph hpi hpk hpo hpp hpr hps hr- hrc hre hrf hrh hri hrk hro hrp hrr hrs hsc hse hsf hsh hsi hsk hsp hsr hss i-f icc ice icf ich ici ick ico icp icr ics ie- iec iee ief iei iek iep ier ies ifc ife iff ifi ifo ifp ifr ifs ihc ihe ihf ihh ihi ihk iho ihp ihr ihs iic iie iif iih iii iio iip iir iis ikc ike ikf iki ikk iko ikr iks io- ioc ioe iof ioh ioi ioo iop ior ios ipc ipe ipf ipi ipo ipp ipr ips ir- irc ire irf iri irk iro irp irr irs is- isc ise isf ish isi isk iso isp isr iss kcc kce kch kci kck kcp kcr kcs ke- kec kee kef keh kei kek keo kep ker kes kfc kff kfh kfi kfo kfs khe khf khh khi khk kho khr khs kic kie kif kih kii kik kio kip kir kis kkc kke kkh kki kkk kkp kkr kks koc koe kof koh koi kok koo kop kor kos kpc kpe kpf kph kpi kpk kpo kpp kpr kps krc krf kri krk kro krp krr krs ksc kse ksf ksh ksi ksk kso ksp ksr kss o-i oc- occ ocf och oci ock oco ocp ocr ocs oec oee oef oeh oei oeo oep oer oes of- ofc ofe off ofi ofo ofp ofr ofs ohc ohe ohf ohh ohi oho ohp ohr ohs oic oie oif oii oik oio oip oir ois okc oke oki okk oko okp okr oks oo- ooc oof ooh ooi ook ooo oop oor oos op- opc ope opf oph opi opk opo opp opr ops or- orc ore orf orh ori ork oro orp orr ors os- osc ose osf osh osi osk oso osp osr oss p-p pcc pce pcf pch pci pck pco pcp pcr pcs pec pee pef peh pei pek peo pep per pes pfc pfe pff pfi pfk pfo pfp pfr pfs phc phe phf phi phk pho php phr phs pic pie pif pih pii pik pio pip pir pis pkc pke pkf pki pko pkp pkr pks poc poe pof poh poi pok poo pop por pos ppc ppe ppf pph ppi ppk ppo ppp ppr pps prc pre prf prh pri prk pro prp prr prs ps- psc pse psf psh psi psk pso psp psr pss rcc rce rcf rch rci rco rcp rcr rcs re- rec ree ref reh rei rek reo rep rer res rfc rfe rff rfh rfi rfk rfo rfp rfr rfs rh- rhc rhe rhf rhh rhi rho rhp rhr rhs ric rie rif rih rii rik rio rip rir ris rkc rke rkf rkk rko rkp rks roc roe rof roh roi rok roo rop ror ros rpc rpe rpf rph rpi rpk rpo rpp rpr rps rrc rrf rrh rri rrk rrp rrr rrs rsc rse rsf rsh rsi rsk rso rsp rsr rss scc sce scf sch sci sck sco scp scr scs se- sec see sef seh sei sek seo sep ser ses sfc sfe sff sfh sfi sfk sfo sfp sfr sfs sh- shc she shf shh shi shk sho shp shr shs sic sie sif sih sii sik sio sip sir sis sk- skc ske skf skh ski skk sko skp skr sks soc soe sof soh soi sok soo sop sor sos spc spe spf sph spi spk spo spp spr sps sr- src sre srf srh sri srk sro srp srr srs ss- ssc sse ssf ssh ssi ssk sso ssp ssr sss