-er -up c-- ccc cce ccg cco ccp ccr ccu ce- cec cee ceg ceo cep cer ceu cgc cge cgg cgo cgp cgr cgu co- coc coe cog coo cop cor cou cpc cpe cpg cpo cpp cpr cpu crc cre crg cro crp crr cru cuc cue cug cuo cup cur cuu ec- ecc ece ecg eco ecr ecu eec eee eeg eeo eep eer egc ege egg ego egp egr egu eo- eoc eoe eog eoo eop eor eou ep- epc epe epg epo epp epr epu erc ere erg ero erp err eru eu- euc eue eug eup eur g-p gcc gce gcg gco gcp gcr gcu ge- gec gee geg geo gep ger geu ggc ggg ggo ggp ggr ggu goc goe gog goo gop gor gou gpc gpe gpg gpo gpp gpr gpu grc gre grg gro grp grr gru gu- guc gue gug guo gup gur guu oc- occ ocg oco ocp ocr ocu oec oee oeg oeo oep oer ogc oge ogg ogo ogp oo- ooc oog ooo oop oor op- opc ope opg opo opp opr or- orc ore org oro orp orr oru ou- ouc oue ouo oup our p-p pcc pce pcg pco pcp pcr pcu pec pee peg peo pep per peu pgc pge pgg pgo pgp pgr poc poe pog poo pop por pou ppc ppe ppg ppo ppp ppr ppu prc pre prg pro prp prr pru puc pue pug pup pur puu rcc rce rcg rco rcp rcr rcu re- rec ree reg reo rep rer reu rgc rge rgg rgo rgp rgr roc roe rog roo rop ror rou rpc rpe rpg rpo rpp rpr rpu rrc rrg rrp rrr rru ruc rue rug ruo rup rur ruu ucc uce ucg uco ucp ucr ucu uec uee ueg uep uer ugc uge ugg ugo ugp ugr ugu uoc uoe uog uoo uop uor up- upc upe upg upo upp upr upu ur- urc ure urg uro urp urr uru uuc uue uug uur uuu