-er -ol c-- ccc cce ccg cck ccl cco ccr ccu ce- cec cee ceg cek cel ceo cer ceu cgc cge cgg cgl cgo cgr cgu ckc cko cl- clc cle clg clk cll clo clr clu co- coc coe cog cok col coo cor cou crc cre crg crk crl cro crr cru cuc cue cug cuk cul cuo cur cuu ec- ecc ece ecg eck ecl eco ecr ecu eec eee eeg eek eel eeo eer egc ege egg egl ego egr egu ekc eke ekg ekl eko ekr eku elc ele elg elk ell elo elr elu eo- eoc eoe eog eok eol eoo eor eou erc ere erg erk erl ero err eru eu- euc eue eug eul eur gcc gce gcg gck gcl gco gcr gcu ge- gec gee geg gek gel geo ger geu ggc ggg ggo ggr ggu gko glc gle glg glk gll glo glr glu goc goe gog gok gol goo gor gou grc gre grg grk grl gro grr gru gu- guc gue gug guk gul guo gur guu kcc kce kcg kck kcl kcr kcu ke- kec kee keg kek kel keo ker kgc kgl kgo kgu kkc kke kkk kkl kkr kku kl- klc klg klo klr klu koc koe kog kok kol koo kor kou krc krg krk krl kro krr kru kuc kue kug kuk kul kur kuu lcc lce lcg lck lcl lco lcr lcu lec lee leg lek lel leo ler leu lgc lge lgg lgk lgl lgo lgr lgu lkg lkl lkr llc lle llg llk lll llo llr llu loc loe log lok lol loo lor lou lrc lrg lrk lro lrr lru luc lue lug luk lul luo lur luu oc- occ ocg ock ocl oco ocr ocu oec oee oeg oel oeo oer ogc oge ogg ogl ogo okc oke okg okk okl oko okr oku olc ole olg olk oll olo olu oo- ooc oog ook ool ooo oor or- orc ore org ork orl oro orr oru ou- ouc oue ouk oul ouo our rcc rce rcg rcl rco rcr rcu re- rec ree reg rek rel reo rer reu rgc rge rgg rgk rgo rgr rkc rke rkg rkk rko rku rlc rle rlg rll rlo rlr rlu roc roe rog rok rol roo ror rou rrc rrg rrk rrl rrr rru ruc rue rug ruk ruo rur ruu ucc uce ucg uck ucl uco ucr ucu uec uee ueg uel uer ugc uge ugg ugk ugl ugo ugr ugu ukc uke ukk ukl ukr uku ulc ule ulg ulk ull ulo ulr ulu uoc uoe uog uok uol uoo uor ur- urc ure urg urk url uro urr uru uuc uue uug uur uuu