-ol c-- ccc ccf ccl cco ccr cfc cff cfl cfo cfr cl- clc clf cll clo clr co- coc cof col coo cor crc crf crl cro crr fcc fcf fcl fco fcr ffc fff ffl ffo ffr flc flf fll flo flr foc fof fol foo for frc frf frl fro frr lcc lcf lcl lco lcr lfc lff lfl lfo lfr llc llf lll llo llr loc lof lol loo lor lrc lrf lro lrr oc- occ ocf ocl oco ocr of- ofc off ofl ofo ofr olc olf oll olo oo- ooc oof ool ooo oor or- orc orf orl oro orr rcc rcf rcl rco rcr rfc rff rfl rfo rfr rlc rlf rll rlo rlr roc rof rol roo ror rrc rrf rrl rrr