c-- ccc ccd cce ccg cck cco cdc cdd cde cdg cdk cdo ce- cec ced cee ceg cek ceo cgc cgd cge cgg cgo ckc ckd cko co- coc cod coe cog cok coo dcc dcd dce dcg dck dco ddc ddd dde ddg ddk ddo de- dec ded dee deg dek deo dgc dgd dge dgg dgk dkc dke dkg dkk dko doc dod doe dog dok doo ec- ecc ecd ece ecg eck eco ed- edc edd ede edg edk edo eec eed eee eeg eek eeo egc egd ege egg ego ekc ekd eke ekg eko eo- eoc eod eoe eog eok eoo g-d gcc gcd gce gcg gck gco gdc gdd gde gdk gdo ge- gec ged gee geg gek geo ggc ggd ggg ggo gkd gko goc god goe gog gok goo kcc kcd kce kcg kck kdc kde kdg kdk kdo ke- kec ked kee keg kek keo kgc kgd kgo kkc kke kkk koc kod koe kog kok koo oc- occ ocd ocg ock oco odc odd ode odg odo oec oed oee oeg oeo ogc ogd oge ogg ogo okc okd oke okg okk oko oo- ooc ood oog ook ooo