-er -ol c-- ccc cce cch cck ccl cco ccr ccs ce- cec cee ceh cek cel ceo cer ces ch- chc che chh chk chl cho chr chs ckc ckh cko cks cl- clc cle clh clk cll clo clr cls co- coc coe coh cok col coo cor cos crc cre crh crk crl cro crr crs csc cse csh csk csl cso csr css ec- ecc ece ech eck ecl eco ecr ecs eec eee eek eel eeo eer ees ehc ehe ehh ehl eho ehr ehs ekc eke ekh ekl eko ekr eks elc ele elh elk ell elo elr els eo- eoc eoe eoh eok eol eoo eor eos erc ere erh erk erl ero err ers es- esc ese esh esk esl eso esr ess hcc hce hch hck hcl hco hcr hcs he- hec hee heh hek hel heo her hes hhc hhe hhh hhk hhl hho hhr hhs hkh hkk hkl hko hkr hks hlc hle hlh hll hlo hlr hls hoc hoe hoh hok hol hoo hor hos hr- hrc hre hrh hrk hrl hro hrr hrs hsc hse hsh hsk hsl hsr hss kcc kce kch kck kcl kcr kcs ke- kec kee keh kek kel keo ker kes khe khh khk kho khr khs kkc kke kkh kkk kkl kkr kks kl- klc klh klo klr kls koc koe koh kok kol koo kor kos krc krk krl kro krr krs ksc kse ksh ksk ksl kso ksr kss lcc lce lch lck lcl lco lcr lcs lec lee leh lek lel leo ler les lhc lhh lhk lho lhr lhs lkh lkl lkr lks llc lle llk lll llo llr lls loc loe loh lok lol loo lor los lrc lrh lrk lro lrr lrs lsc lse lsh lsk lsl lso lsr lss oc- occ och ock ocl oco ocr ocs oec oee oeh oel oeo oer oes ohc ohe ohh ohl oho ohr ohs okc oke okk okl oko okr oks olc ole olk oll olo ols oo- ooc ooh ook ool ooo oor oos or- orc ore orh ork orl oro orr ors os- osc ose osh osk osl oso osr oss rcc rce rch rcl rco rcr rcs re- rec ree reh rek rel reo rer res rh- rhc rhe rhh rhl rho rhr rhs rkc rke rkk rko rks rlc rle rlh rll rlo rlr rls roc roe roh rok rol roo ror ros rrc rrh rrk rrl rrr rrs rsc rse rsh rsk rsl rso rsr rss scc sce sch sck scl sco scr scs se- sec see seh sek sel seo ser ses sh- shc she shh shk shl sho shr shs sk- skc ske skh skk skl sko skr sks slc sle slh slk sll slo slr sls soc soe soh sok sol soo sor sos sr- src sre srh srk srl sro srr srs ss- ssc sse ssh ssk ssl sso ssr sss