-er -ic c-- ccc ccd cce cch cci cck cco ccr cdc cdd cde cdh cdi cdk cdo cdr ce- cec ced cee ceh cei cek ceo cer ch- chc chd che chh chi chk cho chr ci- cic cid cie cih cii cik cio cir ckc ckd ckh cki cko co- coc cod coe coh coi cok coo cor crc crd cre crh cri crk cro crr dcc dcd dce dci dck dco dcr ddc ddd dde ddh ddi ddk ddo ddr de- dec ded dee deh dei dek deo der dh- dhc dhd dhe dhh dhi dhk dho dhr di- dic did die dih dii dik dio dir dkc dke dki dkk dko dkr doc dod doe doh doi dok doo dor drc drd dre dri drk dro drr ec- ecc ecd ece ech eci eck eco ecr ed- edc edd ede edh edi edk edo edr eec eed eee eek eeo eer ehc ehd ehe ehh ehi eho ehr eic eid eie eii eik eio eir ekc ekd eke ekh eki eko ekr eo- eoc eod eoe eoh eoi eok eoo eor erc erd ere erh eri erk ero err h-i hcc hcd hce hch hci hck hco hcr hdc hdd hde hdh hdi hdk hdo hdr he- hec hed hee heh hei hek heo her hhc hhd hhe hhh hhi hhk hho hhr hic hid hie hih hii hik hio hir hkd hkh hki hkk hko hkr hoc hod hoe hoh hoi hok hoo hor hr- hrc hrd hre hrh hri hrk hro hrr i-d icc icd ice ich ici ick ico icr idc idd ide idh idi idk ido idr ie- iec ied iee iei iek ier ihc ihd ihe ihh ihi ihk iho ihr iic iid iie iih iii iio iir ikc ike iki ikk iko ikr io- ioc iod ioe ioh ioi ioo ior ir- irc ird ire iri irk iro irr kcc kcd kce kch kci kck kcr kdc kde kdh kdk kdo kdr ke- kec ked kee keh kei kek keo ker khe khh khi khk kho khr kic kid kie kih kii kik kio kir kkc kke kkh kki kkk kkr koc kod koe koh koi kok koo kor krc krd kri krk kro krr o-i oc- occ ocd och oci ock oco ocr odc odd ode odh odi odo odr oec oed oee oeh oei oeo oer ohc ohd ohe ohh ohi oho ohr oic oid oie oii oik oio oir okc okd oke oki okk oko okr oo- ooc ood ooh ooi ook ooo oor or- orc ord ore orh ori ork oro orr rcc rcd rce rch rci rco rcr rdc rdd rde rdh rdi rdo rdr re- rec red ree reh rei rek reo rer rh- rhc rhd rhe rhh rhi rho rhr ric rid rie rih rii rik rio rir rkc rke rkk rko roc rod roe roh roi rok roo ror rrc rrd rrh rri rrk rrr