-er -ic c-- ccc cce cch cci cck cco ccr ccs ce- cec cee ceh cei cek ceo cer ces ch- chc che chh chi chk cho chr chs ci- cic cie cih cii cik cio cir cis ckc ckh cki cko cks co- coc coe coh coi cok coo cor cos crc cre crh cri crk cro crr crs csc cse csh csi csk cso csr css ec- ecc ece ech eci eck eco ecr ecs eec eee eek eeo eer ees ehc ehe ehh ehi eho ehr ehs eic eie eii eik eio eir eis ekc eke ekh eki eko ekr eks eo- eoc eoe eoh eoi eok eoo eor eos erc ere erh eri erk ero err ers es- esc ese esh esi esk eso esr ess h-i hcc hce hch hci hck hco hcr hcs he- hec hee heh hei hek heo her hes hhc hhe hhh hhi hhk hho hhr hhs hic hie hih hii hik hio hir his hkh hki hkk hko hkr hks hoc hoe hoh hoi hok hoo hor hos hr- hrc hre hrh hri hrk hro hrr hrs hsc hse hsh hsi hsk hsr hss icc ice ich ici ick ico icr ics ie- iec iee iei iek ier ies ihc ihe ihh ihi ihk iho ihr ihs iic iie iih iii iio iir iis ikc ike iki ikk iko ikr iks io- ioc ioe ioh ioi ioo ior ios ir- irc ire iri irk iro irr irs is- isc ise ish isi isk iso isr iss kcc kce kch kci kck kcr kcs ke- kec kee keh kei kek keo ker kes khe khh khi khk kho khr khs kic kie kih kii kik kio kir kis kkc kke kkh kki kkk kkr kks koc koe koh koi kok koo kor kos krc kri krk kro krr krs ksc kse ksh ksi ksk kso ksr kss o-i oc- occ och oci ock oco ocr ocs oec oee oeh oei oeo oer oes ohc ohe ohh ohi oho ohr ohs oic oie oii oik oio oir ois okc oke oki okk oko okr oks oo- ooc ooh ooi ook ooo oor oos or- orc ore orh ori ork oro orr ors os- osc ose osh osi osk oso osr oss rcc rce rch rci rco rcr rcs re- rec ree reh rei rek reo rer res rh- rhc rhe rhh rhi rho rhr rhs ric rie rih rii rik rio rir ris rkc rke rkk rko rks roc roe roh roi rok roo ror ros rrc rrh rri rrk rrr rrs rsc rse rsh rsi rsk rso rsr rss scc sce sch sci sck sco scr scs se- sec see seh sei sek seo ser ses sh- shc she shh shi shk sho shr shs sic sie sih sii sik sio sir sis sk- skc ske skh ski skk sko skr sks soc soe soh soi sok soo sor sos sr- src sre srh sri srk sro srr srs ss- ssc sse ssh ssi ssk sso ssr sss