-ol c-- ccc cce ccf ccl cco ccv ce- cec cee cef cel ceo cev cfc cfe cff cfl cfo cfv cl- clc cle clf cll clo clv co- coc coe cof col coo cov cvc cve cvf cvl cvo cvv ec- ecc ece ecf ecl eco ecv eec eee eef eel eeo eev ef- efc efe eff efl efo elc ele elf ell elo elv eo- eoc eoe eof eol eoo evc eve evf evl evo evv fcc fce fcf fcl fco fcv fec fee fef fel feo fev ffc ffe fff ffl ffo ffv flc fle flf fll flo foc foe fof fol foo fvc lcc lce lcf lcl lco lcv lec lee lef lel leo lev lfc lfe lff lfl lfo llc lle llf lll llo llv loc loe lof lol loo lov lvc lve lvf lvl lvv oc- occ ocf ocl oco ocv oec oee oef oel oeo of- ofc ofe off ofl ofo ofv olc ole olf oll olo oo- ooc oof ool ooo oov ov- ovc ove ovf ovl ovo ovv v-e vcc vce vcf vcl vco vec vee vef vel veo vfc vff vfl vfv vl- vlc vle vlf vll vlo vlv voc voe vof vol voo vov vvc vvo vvv