-er c-- ccc cce ccg cck ccn cco ccr ccu ce- cec cee ceg cek cen ceo cer ceu cgc cge cgg cgn cgo cgr cgu ckc cko cn- cnc cne cng cnn cno cnr cnu co- coc coe cog cok con coo cor cou crc cre crg crk crn cro crr cru cuc cue cug cuk cun cuo cur cuu ec- ecc ece ecg eck ecn eco ecr ecu eec eee eeg eek een eeo eer egc ege egg egn ego egr egu ekc eke ekg eko ekr eku en- enc ene eng enk enn eno enr enu eo- eoc eoe eog eok eon eoo eor eou erc ere erg erk ern ero err eru eu- euc eue eug eun eur gcc gce gcg gck gcn gco gcr gcu ge- gec gee geg gek gen geo ger geu ggc ggg ggn ggo ggr ggu gkn gko gnc gne gnn gno gnr gnu goc goe gog gok gon goo gor gou grc gre grg grk grn gro grr gru gu- guc gue gug guk gun guo gur guu kcc kce kcg kck kcn kcr kcu ke- kec kee keg kek ken keo ker kgc kgo kgu kkc kke kkk kkn kkr kku kn- knc kne kng knk knn kno knr knu koc koe kog kok kon koo kor kou krc krg krk krn kro krr kru kuc kue kug kuk kun kur kuu ncc nce ncg nck ncn nco ncr ncu ne- nec nee neg nek nen neo ner neu ngc nge ngg ngk ngn ngo ngu nkc nke nkk nkn nko nkr nku nnc nne nng nnk nnn nno nnu no- noc noe nog nok non noo nor nou nrc nre nrg nrk nrn nro nrr nru nuc nue nug nuk nun nuo nur nuu oc- occ ocg ock ocn oco ocr ocu oec oee oeg oen oeo oer ogc oge ogg ogn ogo okc oke okg okk oko okr oku on- onc one ong onk onn ono onr onu oo- ooc oog ook oon ooo oor or- orc ore org ork orn oro orr oru ou- ouc oue ouk oun ouo our rcc rce rcg rcn rco rcr rcu re- rec ree reg rek ren reo rer reu rgc rge rgg rgk rgn rgo rgr rkc rke rkg rkk rko rku rnc rng rnn rno rnr rnu roc roe rog rok ron roo ror rou rrc rrg rrk rrn rrr rru ruc rue rug ruk run ruo rur ruu ucc uce ucg uck ucn uco ucr ucu uec uee ueg uen uer ugc uge ugg ugk ugn ugo ugr ugu ukc uke ukk ukn ukr uku un- unc une ung unk unn uno unr unu uoc uoe uog uok uon uoo uor ur- urc ure urg urk urn uro urr uru uuc uue uug uun uur uuu