-ol c-- ccc ccd cce ccl cco ccv cdc cdd cde cdl cdo cdv ce- cec ced cee cel ceo cev cl- clc cld cle cll clo clv co- coc cod coe col coo cov cvc cvd cve cvl cvo cvv dcc dcd dce dcl dco dcv ddc ddd dde ddl ddo de- dec ded dee del deo dev dl- dlc dld dle dll dlo dlv doc dod doe dol doo dov dvc dvd dve dvl ec- ecc ecd ece ecl eco ecv ed- edc edd ede edl edo eec eed eee eel eeo eev elc eld ele ell elo elv eo- eoc eod eoe eol eoo evc evd eve evl evo evv lcc lcd lce lcl lco lcv ldc ldd lde ldl ldo ldv lec led lee lel leo lev llc lld lle lll llo llv loc lod loe lol loo lov lvc lvd lve lvl lvv oc- occ ocd ocl oco ocv odc odd ode odl odo odv oec oed oee oel oeo olc old ole oll olo oo- ooc ood ool ooo oov ov- ovc ovd ove ovl ovo ovv v-e vcc vcd vce vcl vco vdc vdd vde vdl vdo vdv vec ved vee vel veo vl- vlc vld vle vll vlo vlv voc vod voe vol voo vov vvc vvo vvv