-er -ic c-- ccc cce cch cci cck cco ccr ce- cec cee ceh cei cek ceo cer ch- chc che chh chi chk cho chr ci- cic cie cih cii cik cio cir ckc ckh cki cko co- coc coe coh coi cok coo cor crc cre crh cri crk cro crr ec- ecc ece ech eci eck eco ecr eec eee eek eeo eer ehc ehe ehh ehi eho ehr eic eie eii eik eio eir ekc eke ekh eki eko ekr eo- eoc eoe eoh eoi eok eoo eor erc ere erh eri erk ero err h-i hcc hce hch hci hck hco hcr he- hec hee heh hei hek heo her hhc hhe hhh hhi hhk hho hhr hic hie hih hii hik hio hir hkh hki hkk hko hkr hoc hoe hoh hoi hok hoo hor hr- hrc hre hrh hri hrk hro hrr icc ice ich ici ick ico icr ie- iec iee iei iek ier ihc ihe ihh ihi ihk iho ihr iic iie iih iii iio iir ikc ike iki ikk iko ikr io- ioc ioe ioh ioi ioo ior ir- irc ire iri irk iro irr kcc kce kch kci kck kcr ke- kec kee keh kei kek keo ker khe khh khi khk kho khr kic kie kih kii kik kio kir kkc kke kkh kki kkk kkr koc koe koh koi kok koo kor krc kri krk kro krr o-i oc- occ och oci ock oco ocr oec oee oeh oei oeo oer ohc ohe ohh ohi oho ohr oic oie oii oik oio oir okc oke oki okk oko okr oo- ooc ooh ooi ook ooo oor or- orc ore orh ori ork oro orr rcc rce rch rci rco rcr re- rec ree reh rei rek reo rer rh- rhc rhe rhh rhi rho rhr ric rie rih rii rik rio rir rkc rke rkk rko roc roe roh roi rok roo ror rrc rrh rri rrk rrr