-er -ol c-- ccc cce ccf ccl cco ccr ce- cec cee cef cel ceo cer cfc cfe cff cfl cfo cfr cl- clc cle clf cll clo clr co- coc coe cof col coo cor crc cre crf crl cro crr ec- ecc ece ecf ecl eco ecr eec eee eef eel eeo eer ef- efc efe eff efl efo efr elc ele elf ell elo elr eo- eoc eoe eof eol eoo eor erc ere erf erl ero err fcc fce fcf fcl fco fcr fec fee fef fel feo fer ffc ffe fff ffl ffo ffr flc fle flf fll flo flr foc foe fof fol foo for frc fre frf frl fro frr lcc lce lcf lcl lco lcr lec lee lef lel leo ler lfc lfe lff lfl lfo lfr llc lle llf lll llo llr loc loe lof lol loo lor lrc lrf lro lrr oc- occ ocf ocl oco ocr oec oee oef oel oeo oer of- ofc ofe off ofl ofo ofr olc ole olf oll olo oo- ooc oof ool ooo oor or- orc ore orf orl oro orr rcc rce rcf rcl rco rcr re- rec ree ref rel reo rer rfc rfe rff rfl rfo rfr rlc rle rlf rll rlo rlr roc roe rof rol roo ror rrc rrf rrl rrr