-ol c-- ccc ccd cck ccl cco cdc cdd cdk cdl cdo ckc ckd cko cl- clc cld clk cll clo co- coc cod cok col coo dcc dcd dck dcl dco ddc ddd ddk ddl ddo dkc dkk dkl dko dl- dlc dld dlk dll dlo doc dod dok dol doo kcc kcd kck kcl kdc kdk kdl kdo kkc kkk kkl kl- klc kld klo koc kod kok kol koo lcc lcd lck lcl lco ldc ldd ldk ldl ldo lkl llc lld llk lll llo loc lod lok lol loo oc- occ ocd ock ocl oco odc odd odl odo okc okd okk okl oko olc old olk oll olo oo- ooc ood ook ool ooo