-ic c-- ccc ccd ccg cci cck cco ccr cdc cdd cdg cdi cdk cdo cdr cgc cgd cgg cgi cgo cgr ci- cic cid cig cii cik cio cir ckc ckd cki cko co- coc cod cog coi cok coo cor crc crd crg cri crk cro crr dcc dcd dcg dci dck dco dcr ddc ddd ddg ddi ddk ddo ddr dgc dgd dgg dgi dgk dgr di- dic did dig dii dik dio dir dkc dkg dki dkk dko dkr doc dod dog doi dok doo dor drc drd drg dri drk dro drr g-d gcc gcd gcg gci gck gco gcr gdc gdd gdi gdk gdo gdr ggc ggd ggg ggi ggo ggr gic gid gig gii gik gio gir gkd gko goc god gog goi gok goo gor grc grd grg gri grk gro grr i-d icc icd icg ici ick ico icr idc idd idg idi idk ido idr igc igd igg igi igk igo igr iic iid iii iio iir ikc iki ikk iko ikr io- ioc iod iog ioi ioo ior ir- irc ird irg iri irk iro irr kcc kcd kcg kci kck kcr kdc kdg kdk kdo kdr kgc kgd kgi kgo kic kid kig kii kik kio kir kkc kki kkk kkr koc kod kog koi kok koo kor krc krd krg kri krk kro krr o-i oc- occ ocd ocg oci ock oco ocr odc odd odg odi odo odr ogc ogd ogg ogi ogo oic oid oii oik oio oir okc okd okg oki okk oko okr oo- ooc ood oog ooi ook ooo oor or- orc ord org ori ork oro orr rcc rcd rcg rci rco rcr rdc rdd rdg rdi rdo rdr rgc rgd rgg rgi rgk rgo rgr ric rid rig rii rik rio rir rkc rkg rkk rko roc rod rog roi rok roo ror rrc rrd rrg rri rrk rrr