-ol c-- ccc cce ccf ccl cco cct ce- cec cee cef cel ceo cet cfc cfe cff cfl cfo cft cl- clc cle clf cll clo clt co- coc coe cof col coo cot ctc cte ctf ctl cto ctt ec- ecc ece ecf ecl eco ect eec eee eef eel eeo eet ef- efc efe eff efl efo eft elc ele elf ell elo elt eo- eoc eoe eof eol eoo eot etc ete etf etl eto ett fcc fce fcf fcl fco fct fec fee fef fel feo fet ffc ffe fff ffl ffo fft flc fle flf fll flo flt foc foe fof fol foo fot ftc fte ftf ftl fto ftt lcc lce lcf lcl lco lct lec lee lef lel leo let lfc lfe lff lfl lfo lft llc lle llf lll llo llt loc loe lof lol loo lot ltc lte ltf ltl lto ltt oc- occ ocf ocl oco oct oec oee oef oel oeo oet of- ofc ofe off ofl ofo oft olc ole olf oll olo olt oo- ooc oof ool ooo oot ot- otc ote otf otl oto ott tcc tce tcf tcl tco tct te- tec tee tef tel teo tet tfc tfe tff tfl tfo tft tlc tle tlf tll tlo tlt to- toc toe tof tol too tot ttc tte ttf ttl tto ttt