-er -ic a-a a-c a-i aaa aac aae aai aak aao aar aas ac- aca acc ace aci ack aco acr acs aea aec aee aei aek aeo aer aes ai- aia aic aie aii aik aio air ais aka akc ake aki akk ako akr aks aoa aoc aoe aoi aok aoo aor aos ar- ara arc are ari ark aro arr ars as- asa asc ase asi ask aso asr ass c-- caa cac cae cai cak cao car cas cca ccc cce cci cck cco ccr ccs ce- cea cec cee cei cek ceo cer ces ci- cia cic cie cii cik cio cir cis cka ckc cki cko cks co- coa coc coe coi cok coo cor cos cra crc cre cri crk cro crr crs csa csc cse csi csk cso csr css eaa eac eae eai eak eao ear eas ec- eca ecc ece eci eck eco ecr ecs eea eec eee eek eeo eer ees eia eic eie eii eik eio eir eis eka ekc eke eki eko ekr eks eo- eoa eoc eoe eoi eok eoo eor eos era erc ere eri erk ero err ers es- esa esc ese esi esk eso esr ess ia- iaa iac iae iai iao iar ias ica icc ice ici ick ico icr ics ie- iea iec iee iei iek ier ies iia iic iie iii iio iir iis ika ikc ike iki ikk iko ikr iks io- ioa ioc ioe ioi ioo ior ios ir- ira irc ire iri irk iro irr irs is- isa isc ise isi isk iso isr iss ka- kaa kac kae kai kak kao kar kas kca kcc kce kci kck kcr kcs ke- kea kec kee kei kek keo ker kes kia kic kie kii kik kio kir kis kkc kke kki kkk kkr kks koa koc koe koi kok koo kor kos kra krc kri krk kro krr krs ksa ksc kse ksi ksk kso ksr kss o-i oaa oac oae oai oak oao oar oas oc- oca occ oci ock oco ocr ocs oea oec oee oei oeo oer oes oia oic oie oii oik oio oir ois oka okc oke oki okk oko okr oks oo- ooa ooc ooi ook ooo oor oos or- ora orc ore ori ork oro orr ors os- osa osc ose osi osk oso osr oss ra- raa rac rae rai rak rao rar ras rca rcc rce rci rco rcr rcs re- rea rec ree rei rek reo rer res ria ric rie rii rik rio rir ris rkc rke rkk rko rks roa roc roe roi rok roo ror ros rra rrc rri rrk rrr rrs rsa rsc rse rsi rsk rso rsr rss saa sac sae sai sak sao sar sas sca scc sce sci sck sco scr scs se- sea sec see sei sek seo ser ses sia sic sie sii sik sio sir sis sk- ska skc ske ski skk sko skr sks soa soc soe soi sok soo sor sos sr- sra src sre sri srk sro srr srs ss- ssa ssc sse ssi ssk sso ssr sss