c-- ccc ccd cce cch cco ccs cdc cdd cde cdh cdo cds ce- cec ced cee ceh ceo ces ch- chc chd che chh cho chs co- coc cod coe coh coo cos csc csd cse csh cso css dcc dcd dce dco dcs ddc ddd dde ddh ddo dds de- dec ded dee deh deo des dh- dhc dhd dhe dhh dho dhs doc dod doe doh doo dos dsc dsd dse dsh dso dss ec- ecc ecd ece ech eco ecs ed- edc edd ede edh edo eds eec eed eee eeo ees ehc ehd ehe ehh eho ehs eo- eoc eod eoe eoh eoo eos es- esc esd ese esh eso ess hcc hcd hce hch hco hcs hdc hdd hde hdh hdo hds he- hec hed hee heh heo hes hhc hhd hhe hhh hho hhs hoc hod hoe hoh hoo hos hsc hsd hse hsh hss oc- occ ocd och oco ocs odc odd ode odh odo ods oec oed oee oeh oeo oes ohc ohd ohe ohh oho ohs oo- ooc ood ooh ooo oos os- osc osd ose osh oso oss scc scd sce sch sco scs sdc sdd sde sdh sdo sds se- sec sed see seh seo ses sh- shc shd she shh sho shs soc sod soe soh soo sos ss- ssc ssd sse ssh sso sss