c-- ccc ccd cce cch cco cdc cdd cde cdh cdo ce- cec ced cee ceh ceo ch- chc chd che chh cho co- coc cod coe coh coo dcc dcd dce dco ddc ddd dde ddh ddo de- dec ded dee deh deo dh- dhc dhd dhe dhh dho doc dod doe doh doo ec- ecc ecd ece ech eco ed- edc edd ede edh edo eec eed eee eeo ehc ehd ehe ehh eho eo- eoc eod eoe eoh eoo hcc hcd hce hch hco hdc hdd hde hdh hdo he- hec hed hee heh heo hhc hhd hhe hhh hho hoc hod hoe hoh hoo oc- occ ocd och oco odc odd ode odh odo oec oed oee oeh oeo ohc ohd ohe ohh oho oo- ooc ood ooh ooo