-er -ol c-- ccc cce cch ccl cco ccr ccs ce- cec cee ceh cel ceo cer ces ch- chc che chh chl cho chr chs cl- clc cle clh cll clo clr cls co- coc coe coh col coo cor cos crc cre crh crl cro crr crs csc cse csh csl cso csr css ec- ecc ece ech ecl eco ecr ecs eec eee eel eeo eer ees ehc ehe ehh ehl eho ehr ehs elc ele elh ell elo elr els eo- eoc eoe eoh eol eoo eor eos erc ere erh erl ero err ers es- esc ese esh esl eso esr ess hcc hce hch hcl hco hcr hcs he- hec hee heh hel heo her hes hhc hhe hhh hhl hho hhr hhs hlc hle hlh hll hlo hlr hls hoc hoe hoh hol hoo hor hos hr- hrc hre hrh hrl hro hrr hrs hsc hse hsh hsl hsr hss lcc lce lch lcl lco lcr lcs lec lee leh lel leo ler les lhc lhh lho lhr lhs llc lle lll llo llr lls loc loe loh lol loo lor los lrc lrh lro lrr lrs lsc lse lsh lsl lso lsr lss oc- occ och ocl oco ocr ocs oec oee oeh oel oeo oer oes ohc ohe ohh ohl oho ohr ohs olc ole oll olo ols oo- ooc ooh ool ooo oor oos or- orc ore orh orl oro orr ors os- osc ose osh osl oso osr oss rcc rce rch rcl rco rcr rcs re- rec ree reh rel reo rer res rh- rhc rhe rhh rhl rho rhr rhs rlc rle rlh rll rlo rlr rls roc roe roh rol roo ror ros rrc rrh rrl rrr rrs rsc rse rsh rsl rso rsr rss scc sce sch scl sco scr scs se- sec see seh sel seo ser ses sh- shc she shh shl sho shr shs slc sle slh sll slo slr sls soc soe soh sol soo sor sos sr- src sre srh srl sro srr srs ss- ssc sse ssh ssl sso ssr sss