-ol c-- ccc ccd cce cch ccl cco cdc cdd cde cdh cdl cdo ce- cec ced cee ceh cel ceo ch- chc chd che chh chl cho cl- clc cld cle clh cll clo co- coc cod coe coh col coo dcc dcd dce dcl dco ddc ddd dde ddh ddl ddo de- dec ded dee deh del deo dh- dhc dhd dhe dhh dhl dho dl- dlc dld dle dlh dll dlo doc dod doe doh dol doo ec- ecc ecd ece ech ecl eco ed- edc edd ede edh edl edo eec eed eee eel eeo ehc ehd ehe ehh ehl eho elc eld ele elh ell elo eo- eoc eod eoe eoh eol eoo hcc hcd hce hch hcl hco hdc hdd hde hdh hdl hdo he- hec hed hee heh hel heo hhc hhd hhe hhh hhl hho hlc hld hle hlh hll hlo hoc hod hoe hoh hol hoo lcc lcd lce lch lcl lco ldc ldd lde ldh ldl ldo lec led lee leh lel leo lhc lhd lhh lho llc lld lle lll llo loc lod loe loh lol loo oc- occ ocd och ocl oco odc odd ode odh odl odo oec oed oee oeh oel oeo ohc ohd ohe ohh ohl oho olc old ole oll olo oo- ooc ood ooh ool ooo