-er c-- ccc ccd cce ccg ccn cco ccr cdc cdd cde cdg cdn cdo cdr ce- cec ced cee ceg cen ceo cer cgc cgd cge cgg cgn cgo cgr cn- cnc cnd cne cng cnn cno cnr co- coc cod coe cog con coo cor crc crd cre crg crn cro crr dcc dcd dce dcg dcn dco dcr ddc ddd dde ddg ddn ddo ddr de- dec ded dee deg den deo der dgc dgd dge dgg dgn dgr dnc dnd dne dng dnn dno dnr doc dod doe dog don doo dor drc drd dre drg drn dro drr ec- ecc ecd ece ecg ecn eco ecr ed- edc edd ede edg edn edo edr eec eed eee eeg een eeo eer egc egd ege egg egn ego egr en- enc end ene eng enn eno enr eo- eoc eod eoe eog eon eoo eor erc erd ere erg ern ero err g-d gcc gcd gce gcg gcn gco gcr gdc gdd gde gdn gdo gdr ge- gec ged gee geg gen geo ger ggc ggd ggg ggn ggo ggr gnc gnd gne gnn gno gnr goc god goe gog gon goo gor grc grd gre grg grn gro grr ncc ncd nce ncg ncn nco ncr ndc ndd nde ndg ndn ndo ndr ne- nec ned nee neg nen neo ner ngc ngd nge ngg ngn ngo nnc nne nng nnn nno no- noc nod noe nog non noo nor nrc nrd nre nrg nrn nro nrr oc- occ ocd ocg ocn oco ocr odc odd ode odg odn odo odr oec oed oee oeg oen oeo oer ogc ogd oge ogg ogn ogo on- onc ond one ong onn ono onr oo- ooc ood oog oon ooo oor or- orc ord ore org orn oro orr rcc rcd rce rcg rcn rco rcr rdc rdd rde rdg rdn rdo rdr re- rec red ree reg ren reo rer rgc rgd rge rgg rgn rgo rgr rnc rnd rng rnn rno rnr roc rod roe rog ron roo ror rrc rrd rrg rrn rrr