c-cd cccc ccdc cced ccee ccoc ccod cd-e cdec cdex cec- cece ceco cedd cede cedo ceec cexe coce coco codd code coed coex cood coxe cxxx dccc dcxx dddd ddoc dec- decc decd dece deco dedd dede dedo deed dex- dexe do-x doce doco dod- dodd dode dodo dood dxcc dxco dxdc dxec dxed dxoc dxxx eccc ecce ecco ecdc eced eco- ecod eddc edde eddo ede- edex edoc edod eede eeee eeoc eocd eode exco exec exed exo- exod o-eo occc oce oced ocee oddd oded odeo odex odoo oec- oecc oedo oeec oooo oxo- oxox oxxo x-ed xdcc xexe xoco xoxo xxxo xxxx