-ol c-- ccc ccd cck ccl ccn cco cdc cdd cdk cdl cdn cdo ckc ckd cko cl- clc cld clk cll cln clo cn- cnc cnd cnl cnn cno co- coc cod cok col con coo dcc dcd dck dcl dcn dco ddc ddd ddk ddl ddn ddo dkc dkk dkl dko dl- dlc dld dlk dll dlo dnc dnd dnk dnl dnn dno doc dod dok dol don doo kcc kcd kck kcl kcn kdc kdk kdl kdo kkc kkk kkl kkn kl- klc kld klo kn- knc knd knk knl knn kno koc kod kok kol kon koo lcc lcd lck lcl lcn lco ldc ldd ldk ldl ldn ldo lkl llc lld llk lll lln llo lnc lnd lnk lnl lnn lno loc lod lok lol lon loo ncc ncd nck ncl ncn nco ndc ndd ndk ndl ndn ndo nkc nkk nkn nko nlc nld nlk nll nln nlo nnc nnk nnl nnn nno no- noc nod nok nol non noo oc- occ ocd ock ocl ocn oco odc odd odl odn odo okc okd okk okl oko olc old olk oll oln olo on- onc ond onk onl onn ono oo- ooc ood ook ool oon ooo