-er -ic c-- ccc ccd cce cch cci cck cco ccr ccs cdc cdd cde cdh cdi cdk cdo cdr cds ce- cec ced cee ceh cei cek ceo cer ces ch- chc chd che chh chi chk cho chr chs ci- cic cid cie cih cii cik cio cir cis ckc ckd ckh cki cko cks co- coc cod coe coh coi cok coo cor cos crc crd cre crh cri crk cro crr crs csc csd cse csh csi csk cso csr css dcc dcd dce dci dck dco dcr dcs ddc ddd dde ddh ddi ddk ddo ddr dds de- dec ded dee deh dei dek deo der des dh- dhc dhd dhe dhh dhi dhk dho dhr dhs di- dic did die dih dii dik dio dir dis dkc dke dki dkk dko dkr dks doc dod doe doh doi dok doo dor dos drc drd dre dri drk dro drr drs dsc dsd dse dsh dsi dsk dso dsr dss ec- ecc ecd ece ech eci eck eco ecr ecs ed- edc edd ede edh edi edk edo edr eds eec eed eee eek eeo eer ees ehc ehd ehe ehh ehi eho ehr ehs eic eid eie eii eik eio eir eis ekc ekd eke ekh eki eko ekr eks eo- eoc eod eoe eoh eoi eok eoo eor eos erc erd ere erh eri erk ero err ers es- esc esd ese esh esi esk eso esr ess h-i hcc hcd hce hch hci hck hco hcr hcs hdc hdd hde hdh hdi hdk hdo hdr hds he- hec hed hee heh hei hek heo her hes hhc hhd hhe hhh hhi hhk hho hhr hhs hic hid hie hih hii hik hio hir his hkd hkh hki hkk hko hkr hks hoc hod hoe hoh hoi hok hoo hor hos hr- hrc hrd hre hrh hri hrk hro hrr hrs hsc hsd hse hsh hsi hsk hsr hss i-d icc icd ice ich ici ick ico icr ics idc idd ide idh idi idk ido idr ids ie- iec ied iee iei iek ier ies ihc ihd ihe ihh ihi ihk iho ihr ihs iic iid iie iih iii iio iir iis ikc ike iki ikk iko ikr iks io- ioc iod ioe ioh ioi ioo ior ios ir- irc ird ire iri irk iro irr irs is- isc isd ise ish isi isk iso isr iss kcc kcd kce kch kci kck kcr kcs kdc kde kdh kdk kdo kdr kds ke- kec ked kee keh kei kek keo ker kes khe khh khi khk kho khr khs kic kid kie kih kii kik kio kir kis kkc kke kkh kki kkk kkr kks koc kod koe koh koi kok koo kor kos krc krd kri krk kro krr krs ksc ksd kse ksh ksi ksk kso ksr kss o-i oc- occ ocd och oci ock oco ocr ocs odc odd ode odh odi odo odr ods oec oed oee oeh oei oeo oer oes ohc ohd ohe ohh ohi oho ohr ohs oic oid oie oii oik oio oir ois okc okd oke oki okk oko okr oks oo- ooc ood ooh ooi ook ooo oor oos or- orc ord ore orh ori ork oro orr ors os- osc osd ose osh osi osk oso osr oss rcc rcd rce rch rci rco rcr rcs rdc rdd rde rdh rdi rdo rdr rds re- rec red ree reh rei rek reo rer res rh- rhc rhd rhe rhh rhi rho rhr rhs ric rid rie rih rii rik rio rir ris rkc rke rkk rko rks roc rod roe roh roi rok roo ror ros rrc rrd rrh rri rrk rrr rrs rsc rsd rse rsh rsi rsk rso rsr rss scc scd sce sch sci sck sco scr scs sdc sdd sde sdh sdi sdk sdo sdr sds se- sec sed see seh sei sek seo ser ses sh- shc shd she shh shi shk sho shr shs sic sid sie sih sii sik sio sir sis sk- skc skd ske skh ski skk sko skr sks soc sod soe soh soi sok soo sor sos sr- src srd sre srh sri srk sro srr srs ss- ssc ssd sse ssh ssi ssk sso ssr sss