-er -ic c-- ccc ccd cce ccg cci cco ccr ccs cdc cdd cde cdg cdi cdo cdr cds ce- cec ced cee ceg cei ceo cer ces cgc cgd cge cgg cgi cgo cgr cgs ci- cic cid cie cig cii cio cir cis co- coc cod coe cog coi coo cor cos crc crd cre crg cri cro crr crs csc csd cse csg csi cso csr css dcc dcd dce dcg dci dco dcr dcs ddc ddd dde ddg ddi ddo ddr dds de- dec ded dee deg dei deo der des dgc dgd dge dgg dgi dgr dgs di- dic did die dig dii dio dir dis doc dod doe dog doi doo dor dos drc drd dre drg dri dro drr drs dsc dsd dse dsg dsi dso dsr dss ec- ecc ecd ece ecg eci eco ecr ecs ed- edc edd ede edg edi edo edr eds eec eed eee eeg eeo eer ees egc egd ege egg egi ego egr egs eic eid eie eig eii eio eir eis eo- eoc eod eoe eog eoi eoo eor eos erc erd ere erg eri ero err ers es- esc esd ese esg esi eso esr ess g-d gcc gcd gce gcg gci gco gcr gcs gdc gdd gde gdi gdo gdr gds ge- gec ged gee geg gei geo ger ges ggc ggd ggg ggi ggo ggr ggs gic gid gie gig gii gio gir gis goc god goe gog goi goo gor gos grc grd gre grg gri gro grr grs gsc gsd gse gsg gsi gso gsr gss i-d icc icd ice icg ici ico icr ics idc idd ide idg idi ido idr ids ie- iec ied iee ieg iei ier ies igc igd ige igg igi igo igr igs iic iid iie iii iio iir iis io- ioc iod ioe iog ioi ioo ior ios ir- irc ird ire irg iri iro irr irs is- isc isd ise isg isi iso isr iss o-i oc- occ ocd ocg oci oco ocr ocs odc odd ode odg odi odo odr ods oec oed oee oeg oei oeo oer oes ogc ogd oge ogg ogi ogo ogs oic oid oie oii oio oir ois oo- ooc ood oog ooi ooo oor oos or- orc ord ore org ori oro orr ors os- osc osd ose osg osi oso osr oss rcc rcd rce rcg rci rco rcr rcs rdc rdd rde rdg rdi rdo rdr rds re- rec red ree reg rei reo rer res rgc rgd rge rgg rgi rgo rgr rgs ric rid rie rig rii rio rir ris roc rod roe rog roi roo ror ros rrc rrd rrg rri rrr rrs rsc rsd rse rsg rsi rso rsr rss scc scd sce scg sci sco scr scs sdc sdd sde sdg sdi sdo sdr sds se- sec sed see seg sei seo ser ses sgc sgd sge sgg sgi sgo sgr sgs sic sid sie sig sii sio sir sis soc sod soe sog soi soo sor sos sr- src srd sre srg sri sro srr srs ss- ssc ssd sse ssg ssi sso ssr sss