-er c-- ccc cce cch cck cco ccp ccr ccs ce- cec cee ceh cek ceo cep cer ces ch- chc che chh chk cho chp chr chs ckc ckh cko cks co- coc coe coh cok coo cop cor cos cpc cpe cph cpk cpo cpp cpr cps crc cre crh crk cro crp crr crs csc cse csh csk cso csp csr css ec- ecc ece ech eck eco ecr ecs eec eee eek eeo eep eer ees ehc ehe ehh eho ehp ehr ehs ekc eke ekh eko ekp ekr eks eo- eoc eoe eoh eok eoo eop eor eos ep- epc epe eph epo epp epr eps erc ere erh erk ero erp err ers es- esc ese esh esk eso esp esr ess hcc hce hch hck hco hcp hcr hcs he- hec hee heh hek heo hep her hes hhc hhe hhh hhk hho hhp hhr hhs hkh hkk hko hkp hkr hks hoc hoe hoh hok hoo hop hor hos hpc hpe hph hpk hpo hpp hpr hps hr- hrc hre hrh hrk hro hrp hrr hrs hsc hse hsh hsk hsp hsr hss kcc kce kch kck kcp kcr kcs ke- kec kee keh kek keo kep ker kes khe khh khk kho khr khs kkc kke kkh kkk kkp kkr kks koc koe koh kok koo kop kor kos kpc kpe kph kpk kpo kpp kpr kps krc krk kro krp krr krs ksc kse ksh ksk kso ksp ksr kss oc- occ och ock oco ocp ocr ocs oec oee oeh oeo oep oer oes ohc ohe ohh oho ohp ohr ohs okc oke okk oko okp okr oks oo- ooc ooh ook ooo oop oor oos op- opc ope oph opk opo opp opr ops or- orc ore orh ork oro orp orr ors os- osc ose osh osk oso osp osr oss p-p pcc pce pch pck pco pcp pcr pcs pec pee peh pek peo pep per pes phc phe phk pho php phr phs pkc pke pko pkp pkr pks poc poe poh pok poo pop por pos ppc ppe pph ppk ppo ppp ppr pps prc pre prh prk pro prp prr prs ps- psc pse psh psk pso psp psr pss rcc rce rch rco rcp rcr rcs re- rec ree reh rek reo rep rer res rh- rhc rhe rhh rho rhp rhr rhs rkc rke rkk rko rkp rks roc roe roh rok roo rop ror ros rpc rpe rph rpk rpo rpp rpr rps rrc rrh rrk rrp rrr rrs rsc rse rsh rsk rso rsp rsr rss scc sce sch sck sco scp scr scs se- sec see seh sek seo sep ser ses sh- shc she shh shk sho shp shr shs sk- skc ske skh skk sko skp skr sks soc soe soh sok soo sop sor sos spc spe sph spk spo spp spr sps sr- src sre srh srk sro srp srr srs ss- ssc sse ssh ssk sso ssp ssr sss