-er -ol c-- ccc cce ccf cck ccl cco ccr ccs ccu ce- cec cee cef cek cel ceo cer ces ceu cfc cfe cff cfk cfl cfo cfr cfs cfu ckc cko cks cl- clc cle clf clk cll clo clr cls clu co- coc coe cof cok col coo cor cos cou crc cre crf crk crl cro crr crs cru csc cse csf csk csl cso csr css csu cuc cue cuf cuk cul cuo cur cus cuu ec- ecc ece ecf eck ecl eco ecr ecs ecu eec eee eef eek eel eeo eer ees ef- efc efe eff efl efo efr efs ekc eke ekf ekl eko ekr eks eku elc ele elf elk ell elo elr els elu eo- eoc eoe eof eok eol eoo eor eos eou erc ere erf erk erl ero err ers eru es- esc ese esf esk esl eso esr ess esu eu- euc eue euf eul eur eus fcc fce fcf fck fcl fco fcr fcs fcu fec fee fef fek fel feo fer fes feu ffc ffe fff ffk ffl ffo ffr ffs ffu fkc fkf fkk fkl flc fle flf fll flo flr fls flu foc foe fof fok fol foo for fos fou frc fre frf frk frl fro frr frs fru fsc fse fsf fsk fsl fso fsr fss fsu fue fuf fuk ful fuo fur fus fuu kcc kce kck kcl kcr kcs kcu ke- kec kee kef kek kel keo ker kes kfc kff kfo kfs kfu kkc kke kkk kkl kkr kks kku kl- klc klf klo klr kls klu koc koe kof kok kol koo kor kos kou krc krf krk krl kro krr krs kru ksc kse ksf ksk ksl kso ksr kss ksu kuc kue kuk kul kur kus kuu lcc lce lcf lck lcl lco lcr lcs lcu lec lee lef lek lel leo ler les leu lfc lfe lff lfk lfl lfo lfr lfs lfu lkl lkr lks llc lle llf llk lll llo llr lls llu loc loe lof lok lol loo lor los lou lrc lrf lrk lro lrr lrs lru lsc lse lsf lsk lsl lso lsr lss lsu luc lue luf luk lul luo lur lus luu oc- occ ocf ock ocl oco ocr ocs ocu oec oee oef oel oeo oer oes of- ofc ofe off ofl ofo ofr ofs ofu okc oke okk okl oko okr oks oku olc ole olf olk oll olo ols olu oo- ooc oof ook ool ooo oor oos or- orc ore orf ork orl oro orr ors oru os- osc ose osf osk osl oso osr oss osu ou- ouc oue ouf ouk oul ouo our ous rcc rce rcf rcl rco rcr rcs rcu re- rec ree ref rek rel reo rer res reu rfc rfe rff rfk rfl rfo rfr rfs rfu rkc rke rkf rkk rko rks rku rlc rle rlf rll rlo rlr rls rlu roc roe rof rok rol roo ror ros rou rrc rrf rrk rrl rrr rrs rru rsc rse rsf rsk rsl rso rsr rss rsu ruc rue ruf ruk ruo rur rus ruu scc sce scf sck scl sco scr scs scu se- sec see sef sek sel seo ser ses seu sfc sfe sff sfk sfl sfo sfr sfs sfu sk- skc ske skf skk skl sko skr sks sku slc sle slf slk sll slo slr sls slu soc soe sof sok sol soo sor sos sou sr- src sre srf srk srl sro srr srs ss- ssc sse ssf ssk ssl sso ssr sss ssu suc sue suf suk sul suo sur sus suu ucc uce ucf uck ucl uco ucr ucs ucu uec uee uef uel uer ues ufc ufe uff ufl ufo ufr ufs ufu ukc uke ukf ukk ukl ukr uku ulc ule ulf ulk ull ulo ulr uls ulu uoc uoe uok uol uoo uor uos ur- urc ure urf urk url uro urr urs uru usc use usf usk usl uso usr uss usu uuc uue uur uus uuu