-er -ol c-- ccc cce cch ccl ccn cco ccr ccu ce- cec cee ceh cel cen ceo cer ceu ch- chc che chh chl chn cho chr chu cl- clc cle clh cll cln clo clr clu cn- cnc cne cnh cnl cnn cno cnr cnu co- coc coe coh col con coo cor cou crc cre crh crl crn cro crr cru cuc cue cuh cul cun cuo cur cuu ec- ecc ece ech ecl ecn eco ecr ecu eec eee eel een eeo eer ehc ehe ehh ehl ehn eho ehr ehu elc ele elh ell eln elo elr elu en- enc ene enh enl enn eno enr enu eo- eoc eoe eoh eol eon eoo eor eou erc ere erh erl ern ero err eru eu- euc eue eul eun eur hcc hce hch hcl hcn hco hcr he- hec hee heh hel hen heo her heu hhc hhe hhh hhl hhn hho hhr hhu hlc hle hlh hll hln hlo hlr hlu hnc hne hnh hnl hnn hno hnu hoc hoe hoh hol hon hoo hor hou hr- hrc hre hrh hrl hrn hro hrr hru huc hue huh hul hun huo hur huu lcc lce lch lcl lcn lco lcr lcu lec lee leh lel len leo ler leu lhc lhh lho lhr lhu llc lle lll lln llo llr llu lnc lne lnh lnl lnn lno lnr lnu loc loe loh lol lon loo lor lou lrc lrh lrn lro lrr lru luc lue luh lul lun luo lur luu ncc nce nch ncl ncn nco ncr ncu ne- nec nee neh nel nen neo ner neu nhc nhe nhh nhl nhn nhr nhu nlc nle nlh nll nln nlo nlr nlu nnc nne nnh nnl nnn nno nnu no- noc noe noh nol non noo nor nou nrc nre nrl nrn nro nrr nru nuc nue nuh nul nun nuo nur nuu oc- occ och ocl ocn oco ocr ocu oec oee oeh oel oen oeo oer ohc ohe ohh ohl ohn oho ohr ohu olc ole oll oln olo olu on- onc one onh onl onn ono onr onu oo- ooc ooh ool oon ooo oor or- orc ore orh orl orn oro orr oru ou- ouc oue ouh oul oun ouo our rcc rce rch rcl rcn rco rcr rcu re- rec ree reh rel ren reo rer reu rh- rhc rhe rhh rhl rhn rho rhr rhu rlc rle rlh rll rln rlo rlr rlu rnc rnh rnn rno rnr rnu roc roe roh rol ron roo ror rou rrc rrh rrl rrn rrr rru ruc rue ruh run ruo rur ruu ucc uce uch ucl ucn uco ucr ucu uec uee ueh uel uen uer uhc uhe uhh uhl uho uhr uhu ulc ule ull uln ulo ulr ulu un- unc une unh unl unn uno unr unu uoc uoe uol uon uoo uor ur- urc ure url urn uro urr uru uuc uue uun uur uuu