-er -ol c-- ccc cce ccf ccl cco ccr ccu ce- cec cee cef cel ceo cer ceu cfc cfe cff cfl cfo cfr cfu cl- clc cle clf cll clo clr clu co- coc coe cof col coo cor cou crc cre crf crl cro crr cru cuc cue cuf cul cuo cur cuu ec- ecc ece ecf ecl eco ecr ecu eec eee eef eel eeo eer ef- efc efe eff efl efo efr elc ele elf ell elo elr elu eo- eoc eoe eof eol eoo eor eou erc ere erf erl ero err eru eu- euc eue euf eul eur fcc fce fcf fcl fco fcr fcu fec fee fef fel feo fer feu ffc ffe fff ffl ffo ffr ffu flc fle flf fll flo flr flu foc foe fof fol foo for fou frc fre frf frl fro frr fru fue fuf ful fuo fur fuu lcc lce lcf lcl lco lcr lcu lec lee lef lel leo ler leu lfc lfe lff lfl lfo lfr lfu llc lle llf lll llo llr llu loc loe lof lol loo lor lou lrc lrf lro lrr lru luc lue luf lul luo lur luu oc- occ ocf ocl oco ocr ocu oec oee oef oel oeo oer of- ofc ofe off ofl ofo ofr ofu olc ole olf oll olo olu oo- ooc oof ool ooo oor or- orc ore orf orl oro orr oru ou- ouc oue ouf oul ouo our rcc rce rcf rcl rco rcr rcu re- rec ree ref rel reo rer reu rfc rfe rff rfl rfo rfr rfu rlc rle rlf rll rlo rlr rlu roc roe rof rol roo ror rou rrc rrf rrl rrr rru ruc rue ruf ruo rur ruu ucc uce ucf ucl uco ucr ucu uec uee uef uel uer ufc ufe uff ufl ufo ufr ufu ulc ule ulf ull ulo ulr ulu uoc uoe uol uoo uor ur- urc ure urf url uro urr uru uuc uue uur uuu