-ol c-- ccc cce ccf cck ccl cco ce- cec cee cef cek cel ceo cfc cfe cff cfk cfl cfo ckc cko cl- clc cle clf clk cll clo co- coc coe cof cok col coo ec- ecc ece ecf eck ecl eco eec eee eef eek eel eeo ef- efc efe eff efl efo ekc eke ekf ekl eko elc ele elf elk ell elo eo- eoc eoe eof eok eol eoo fcc fce fcf fck fcl fco fec fee fef fek fel feo ffc ffe fff ffk ffl ffo fkc fkf fkk fkl flc fle flf fll flo foc foe fof fok fol foo kcc kce kck kcl ke- kec kee kef kek kel keo kfc kff kfo kkc kke kkk kkl kl- klc klf klo koc koe kof kok kol koo lcc lce lcf lck lcl lco lec lee lef lek lel leo lfc lfe lff lfk lfl lfo lkl llc lle llf llk lll llo loc loe lof lok lol loo oc- occ ocf ock ocl oco oec oee oef oel oeo of- ofc ofe off ofl ofo okc oke okk okl oko olc ole olf olk oll olo oo- ooc oof ook ool ooo