-er -ol c-- ccc cce ccf ccl cco ccr ccs ccu ce- cec cee cef cel ceo cer ces ceu cfc cfe cff cfl cfo cfr cfs cfu cl- clc cle clf cll clo clr cls clu co- coc coe cof col coo cor cos cou crc cre crf crl cro crr crs cru csc cse csf csl cso csr css csu cuc cue cuf cul cuo cur cus cuu ec- ecc ece ecf ecl eco ecr ecs ecu eec eee eef eel eeo eer ees ef- efc efe eff efl efo efr efs elc ele elf ell elo elr els elu eo- eoc eoe eof eol eoo eor eos eou erc ere erf erl ero err ers eru es- esc ese esf esl eso esr ess esu eu- euc eue euf eul eur eus fcc fce fcf fcl fco fcr fcs fcu fec fee fef fel feo fer fes feu ffc ffe fff ffl ffo ffr ffs ffu flc fle flf fll flo flr fls flu foc foe fof fol foo for fos fou frc fre frf frl fro frr frs fru fsc fse fsf fsl fso fsr fss fsu fue fuf ful fuo fur fus fuu lcc lce lcf lcl lco lcr lcs lcu lec lee lef lel leo ler les leu lfc lfe lff lfl lfo lfr lfs lfu llc lle llf lll llo llr lls llu loc loe lof lol loo lor los lou lrc lrf lro lrr lrs lru lsc lse lsf lsl lso lsr lss lsu luc lue luf lul luo lur lus luu oc- occ ocf ocl oco ocr ocs ocu oec oee oef oel oeo oer oes of- ofc ofe off ofl ofo ofr ofs ofu olc ole olf oll olo ols olu oo- ooc oof ool ooo oor oos or- orc ore orf orl oro orr ors oru os- osc ose osf osl oso osr oss osu ou- ouc oue ouf oul ouo our ous rcc rce rcf rcl rco rcr rcs rcu re- rec ree ref rel reo rer res reu rfc rfe rff rfl rfo rfr rfs rfu rlc rle rlf rll rlo rlr rls rlu roc roe rof rol roo ror ros rou rrc rrf rrl rrr rrs rru rsc rse rsf rsl rso rsr rss rsu ruc rue ruf ruo rur rus ruu scc sce scf scl sco scr scs scu se- sec see sef sel seo ser ses seu sfc sfe sff sfl sfo sfr sfs sfu slc sle slf sll slo slr sls slu soc soe sof sol soo sor sos sou sr- src sre srf srl sro srr srs ss- ssc sse ssf ssl sso ssr sss ssu suc sue suf sul suo sur sus suu ucc uce ucf ucl uco ucr ucs ucu uec uee uef uel uer ues ufc ufe uff ufl ufo ufr ufs ufu ulc ule ulf ull ulo ulr uls ulu uoc uoe uol uoo uor uos ur- urc ure urf url uro urr urs uru usc use usf usl uso usr uss usu uuc uue uur uus uuu