-ol c-- ccc ccd cce ccf cck ccl cco cdc cdd cde cdf cdk cdl cdo ce- cec ced cee cef cek cel ceo cfc cfd cfe cff cfk cfl cfo ckc ckd cko cl- clc cld cle clf clk cll clo co- coc cod coe cof cok col coo dcc dcd dce dcf dck dcl dco ddc ddd dde ddf ddk ddl ddo de- dec ded dee def dek del deo dfc dfd dfe dff dfk dfl dfo dkc dke dkk dkl dko dl- dlc dld dle dlf dlk dll dlo doc dod doe dof dok dol doo ec- ecc ecd ece ecf eck ecl eco ed- edc edd ede edf edk edl edo eec eed eee eef eek eel eeo ef- efc efd efe eff efl efo ekc ekd eke ekf ekl eko elc eld ele elf elk ell elo eo- eoc eod eoe eof eok eol eoo fcc fcd fce fcf fck fcl fco fdc fdd fde fdf fdk fdl fdo fec fed fee fef fek fel feo ffc ffd ffe fff ffk ffl ffo fkc fkf fkk fkl flc fld fle flf fll flo foc foe fof fok fol foo kcc kcd kce kck kcl kdc kde kdf kdk kdl kdo ke- kec ked kee kef kek kel keo kfc kfd kff kfo kkc kke kkk kkl kl- klc kld klf klo koc kod koe kof kok kol koo lcc lcd lce lcf lck lcl lco ldc ldd lde ldf ldk ldl ldo lec led lee lef lek lel leo lfc lfd lfe lff lfk lfl lfo lkl llc lld lle llf llk lll llo loc lod loe lof lok lol loo oc- occ ocd ocf ock ocl oco odc odd ode odf odl odo oec oed oee oef oel oeo of- ofc ofd ofe off ofl ofo okc okd oke okk okl oko olc old ole olf olk oll olo oo- ooc ood oof ook ool ooo