-er -ic c-- ccc cce cch cci cck cco ccp ccr ccs ce- cec cee ceh cei cek ceo cep cer ces ch- chc che chh chi chk cho chp chr chs ci- cic cie cih cii cik cio cip cir cis ckc ckh cki cko cks co- coc coe coh coi cok coo cop cor cos cpc cpe cph cpi cpk cpo cpp cpr cps crc cre crh cri crk cro crp crr crs csc cse csh csi csk cso csp csr css ec- ecc ece ech eci eck eco ecr ecs eec eee eek eeo eep eer ees ehc ehe ehh ehi eho ehp ehr ehs eic eie eii eik eio eip eir eis ekc eke ekh eki eko ekp ekr eks eo- eoc eoe eoh eoi eok eoo eop eor eos ep- epc epe eph epi epo epp epr eps erc ere erh eri erk ero erp err ers es- esc ese esh esi esk eso esp esr ess h-i hcc hce hch hci hck hco hcp hcr hcs he- hec hee heh hei hek heo hep her hes hhc hhe hhh hhi hhk hho hhp hhr hhs hic hie hih hii hik hio hip hir his hkh hki hkk hko hkp hkr hks hoc hoe hoh hoi hok hoo hop hor hos hpc hpe hph hpi hpk hpo hpp hpr hps hr- hrc hre hrh hri hrk hro hrp hrr hrs hsc hse hsh hsi hsk hsp hsr hss icc ice ich ici ick ico icp icr ics ie- iec iee iei iek iep ier ies ihc ihe ihh ihi ihk iho ihp ihr ihs iic iie iih iii iio iip iir iis ikc ike iki ikk iko ikr iks io- ioc ioe ioh ioi ioo iop ior ios ipc ipe ipi ipo ipp ipr ips ir- irc ire iri irk iro irp irr irs is- isc ise ish isi isk iso isp isr iss kcc kce kch kci kck kcp kcr kcs ke- kec kee keh kei kek keo kep ker kes khe khh khi khk kho khr khs kic kie kih kii kik kio kip kir kis kkc kke kkh kki kkk kkp kkr kks koc koe koh koi kok koo kop kor kos kpc kpe kph kpi kpk kpo kpp kpr kps krc kri krk kro krp krr krs ksc kse ksh ksi ksk kso ksp ksr kss o-i oc- occ och oci ock oco ocp ocr ocs oec oee oeh oei oeo oep oer oes ohc ohe ohh ohi oho ohp ohr ohs oic oie oii oik oio oip oir ois okc oke oki okk oko okp okr oks oo- ooc ooh ooi ook ooo oop oor oos op- opc ope oph opi opk opo opp opr ops or- orc ore orh ori ork oro orp orr ors os- osc ose osh osi osk oso osp osr oss p-p pcc pce pch pci pck pco pcp pcr pcs pec pee peh pei pek peo pep per pes phc phe phi phk pho php phr phs pic pie pih pii pik pio pip pir pis pkc pke pki pko pkp pkr pks poc poe poh poi pok poo pop por pos ppc ppe pph ppi ppk ppo ppp ppr pps prc pre prh pri prk pro prp prr prs ps- psc pse psh psi psk pso psp psr pss rcc rce rch rci rco rcp rcr rcs re- rec ree reh rei rek reo rep rer res rh- rhc rhe rhh rhi rho rhp rhr rhs ric rie rih rii rik rio rip rir ris rkc rke rkk rko rkp rks roc roe roh roi rok roo rop ror ros rpc rpe rph rpi rpk rpo rpp rpr rps rrc rrh rri rrk rrp rrr rrs rsc rse rsh rsi rsk rso rsp rsr rss scc sce sch sci sck sco scp scr scs se- sec see seh sei sek seo sep ser ses sh- shc she shh shi shk sho shp shr shs sic sie sih sii sik sio sip sir sis sk- skc ske skh ski skk sko skp skr sks soc soe soh soi sok soo sop sor sos spc spe sph spi spk spo spp spr sps sr- src sre srh sri srk sro srp srr srs ss- ssc sse ssh ssi ssk sso ssp ssr sss