-er -ic c-- ccc cce cch cci cck cco ccp ccr ce- cec cee ceh cei cek ceo cep cer ch- chc che chh chi chk cho chp chr ci- cic cie cih cii cik cio cip cir ckc ckh cki cko co- coc coe coh coi cok coo cop cor cpc cpe cph cpi cpk cpo cpp cpr crc cre crh cri crk cro crp crr ec- ecc ece ech eci eck eco ecr eec eee eek eeo eep eer ehc ehe ehh ehi eho ehp ehr eic eie eii eik eio eip eir ekc eke ekh eki eko ekp ekr eo- eoc eoe eoh eoi eok eoo eop eor ep- epc epe eph epi epo epp epr erc ere erh eri erk ero erp err h-i hcc hce hch hci hck hco hcp hcr he- hec hee heh hei hek heo hep her hhc hhe hhh hhi hhk hho hhp hhr hic hie hih hii hik hio hip hir hkh hki hkk hko hkp hkr hoc hoe hoh hoi hok hoo hop hor hpc hpe hph hpi hpk hpo hpp hpr hr- hrc hre hrh hri hrk hro hrp hrr icc ice ich ici ick ico icp icr ie- iec iee iei iek iep ier ihc ihe ihh ihi ihk iho ihp ihr iic iie iih iii iio iip iir ikc ike iki ikk iko ikr io- ioc ioe ioh ioi ioo iop ior ipc ipe ipi ipo ipp ipr ir- irc ire iri irk iro irp irr kcc kce kch kci kck kcp kcr ke- kec kee keh kei kek keo kep ker khe khh khi khk kho khr kic kie kih kii kik kio kip kir kkc kke kkh kki kkk kkp kkr koc koe koh koi kok koo kop kor kpc kpe kph kpi kpk kpo kpp kpr krc kri krk kro krp krr o-i oc- occ och oci ock oco ocp ocr oec oee oeh oei oeo oep oer ohc ohe ohh ohi oho ohp ohr oic oie oii oik oio oip oir okc oke oki okk oko okp okr oo- ooc ooh ooi ook ooo oop oor op- opc ope oph opi opk opo opp opr or- orc ore orh ori ork oro orp orr p-p pcc pce pch pci pck pco pcp pcr pec pee peh pei pek peo pep per phc phe phi phk pho php phr pic pie pih pii pik pio pip pir pkc pke pki pko pkp pkr poc poe poh poi pok poo pop por ppc ppe pph ppi ppk ppo ppp ppr prc pre prh pri prk pro prp prr rcc rce rch rci rco rcp rcr re- rec ree reh rei rek reo rep rer rh- rhc rhe rhh rhi rho rhp rhr ric rie rih rii rik rio rip rir rkc rke rkk rko rkp roc roe roh roi rok roo rop ror rpc rpe rph rpi rpk rpo rpp rpr rrc rrh rri rrk rrp rrr