-er c-- ccc ccd cce ccf ccg cck cco ccr ccu cdc cdd cde cdf cdg cdk cdo cdr cdu ce- cec ced cee cef ceg cek ceo cer ceu cfc cfd cfe cff cfg cfk cfo cfr cfu cgc cgd cge cgg cgo cgr cgu ckc ckd cko co- coc cod coe cof cog cok coo cor cou crc crd cre crf crg crk cro crr cru cuc cud cue cuf cug cuk cuo cur cuu dcc dcd dce dcf dcg dck dco dcr dcu ddc ddd dde ddf ddg ddk ddo ddr ddu de- dec ded dee def deg dek deo der deu dfc dfd dfe dff dfg dfk dfo dfr dfu dgc dgd dge dgf dgg dgk dgr dgu dkc dke dkg dkk dko dkr dku doc dod doe dof dog dok doo dor dou drc drd dre drg drk dro drr dru duc dud due duf dug duk duo dur ec- ecc ecd ece ecf ecg eck eco ecr ecu ed- edc edd ede edf edg edk edo edr edu eec eed eee eef eeg eek eeo eer ef- efc efd efe eff efg efo efr egc egd ege egf egg ego egr egu ekc ekd eke ekf ekg eko ekr eku eo- eoc eod eoe eof eog eok eoo eor eou erc erd ere erf erg erk ero err eru eu- euc eud eue euf eug eur fcc fcd fce fcf fcg fck fco fcr fcu fdc fdd fde fdf fdg fdk fdo fdr fdu fec fed fee fef feg fek feo fer feu ffc ffd ffe fff ffg ffk ffo ffr ffu fgc fgd fge fgf fgg fgr fkc fkf fkg fkk foc foe fof fog fok foo for fou frc frd fre frf frg frk fro frr fru fud fue fuf fug fuk fuo fur fuu g-d gcc gcd gce gcf gcg gck gco gcr gcu gdc gdd gde gdf gdk gdo gdr gdu ge- gec ged gee gef geg gek geo ger geu gfc gfd gfe gff gfk gfo gfr ggc ggd ggg ggo ggr ggu gkd gko goc god goe gof gog gok goo gor gou grc grd gre grf grg grk gro grr gru gu- guc gud gue guf gug guk guo gur guu kcc kcd kce kcg kck kcr kcu kdc kde kdf kdg kdk kdo kdr kdu ke- kec ked kee kef keg kek keo ker kfc kfd kff kfg kfo kfu kgc kgd kgf kgo kgu kkc kke kkk kkr kku koc kod koe kof kog kok koo kor kou krc krd krf krg krk kro krr kru kuc kud kue kug kuk kur kuu oc- occ ocd ocf ocg ock oco ocr ocu odc odd ode odf odg odo odr odu oec oed oee oef oeg oeo oer of- ofc ofd ofe off ofg ofo ofr ofu ogc ogd oge ogf ogg ogo okc okd oke okg okk oko okr oku oo- ooc ood oof oog ook ooo oor or- orc ord ore orf org ork oro orr oru ou- ouc oud oue ouf ouk ouo our rcc rcd rce rcf rcg rco rcr rcu rdc rdd rde rdf rdg rdo rdr rdu re- rec red ree ref reg rek reo rer reu rfc rfd rfe rff rfg rfk rfo rfr rfu rgc rgd rge rgf rgg rgk rgo rgr rkc rke rkf rkg rkk rko rku roc rod roe rof rog rok roo ror rou rrc rrd rrf rrg rrk rrr rru ruc rud rue ruf rug ruk ruo rur ruu ucc ucd uce ucf ucg uck uco ucr ucu udc udd ude udf udg udk udo udr udu uec ued uee uef ueg uer ufc ufd ufe uff ufg ufo ufr ufu ugc uge ugf ugg ugk ugo ugr ugu ukc uke ukf ukk ukr uku uoc uod uoe uog uok uoo uor ur- urc urd ure urf urg urk uro urr uru uuc uue uug uur uuu