-er c-- ccc cce ccf cck cco ccr ccs cct ccu ce- cec cee cef cek ceo cer ces cet ceu cfc cfe cff cfk cfo cfr cfs cft cfu ckc cko cks ckt co- coc coe cof cok coo cor cos cot cou crc cre crf crk cro crr crs crt cru csc cse csf csk cso csr css cst csu ctc cte ctf ctk cto ctr cts ctt ctu cuc cue cuf cuk cuo cur cus cut cuu ec- ecc ece ecf eck eco ecr ecs ect ecu eec eee eef eek eeo eer ees eet ef- efc efe eff efo efr efs eft ekc eke ekf eko ekr eks ekt eku eo- eoc eoe eof eok eoo eor eos eot eou erc ere erf erk ero err ers ert eru es- esc ese esf esk eso esr ess est esu etc ete etf etk eto etr ets ett etu eu- euc eue euf eur eus eut fcc fce fcf fck fco fcr fcs fct fcu fec fee fef fek feo fer fes fet feu ffc ffe fff ffk ffo ffr ffs fft ffu fkc fkf fkk fkt foc foe fof fok foo for fos fot fou frc fre frf frk fro frr frs frt fru fsc fse fsf fsk fso fsr fss fst fsu ftc fte ftf ftk fto ftr fts ftt ftu fue fuf fuk fuo fur fus fut fuu k-t kcc kce kck kcr kcs kct kcu ke- kec kee kef kek keo ker kes ket kfc kff kfo kfs kfu kkc kke kkk kkr kks kkt kku koc koe kof kok koo kor kos kot kou krc krf krk kro krr krs krt kru ksc kse ksf ksk kso ksr kss kst ksu ktc kte ktf ktk kto ktr kts ktt ktu kuc kue kuk kur kus kut kuu oc- occ ocf ock oco ocr ocs oct ocu oec oee oef oeo oer oes oet of- ofc ofe off ofo ofr ofs oft ofu okc oke okk oko okr oks oku oo- ooc oof ook ooo oor oos oot or- orc ore orf ork oro orr ors ort oru os- osc ose osf osk oso osr oss ost osu ot- otc ote otf otk oto otr ots ott otu ou- ouc oue ouf ouk ouo our ous out rcc rce rcf rco rcr rcs rct rcu re- rec ree ref rek reo rer res ret reu rfc rfe rff rfk rfo rfr rfs rft rfu rkc rke rkf rkk rko rks rkt rku roc roe rof rok roo ror ros rot rou rrc rrf rrk rrr rrs rrt rru rsc rse rsf rsk rso rsr rss rst rsu rtc rte rtf rtk rto rtr rts rtt rtu ruc rue ruf ruk ruo rur rus rut ruu scc sce scf sck sco scr scs sct scu se- sec see sef sek seo ser ses set seu sfc sfe sff sfk sfo sfr sfs sft sfu sk- skc ske skf skk sko skr sks skt sku soc soe sof sok soo sor sos sot sou sr- src sre srf srk sro srr srs srt ss- ssc sse ssf ssk sso ssr sss sst ssu stc ste stf stk sto str sts stt stu suc sue suf suk suo sur sus sut suu tcc tce tcf tck tco tcr tcs tct tcu te- tec tee tef tek teo ter tes tet teu tfc tfe tff tfk tfo tfr tfs tft tfu tkc tke tkk tko tkr tks tkt to- toc toe tof tok too tor tos tot tou trc tre trf trk tro trr trs trt tru tsc tse tsf tsk tso tsr tss tst tsu ttc tte ttf ttk tto ttr tts ttt ttu tuc tue tuf tuk tuo tur tus tut tuu ucc uce ucf uck uco ucr ucs uct ucu uec uee uef uer ues uet ufc ufe uff ufo ufr ufs uft ufu ukc uke ukf ukk ukr uku uoc uoe uok uoo uor uos uot ur- urc ure urf urk uro urr urs urt uru usc use usf usk uso usr uss ust usu utc ute utf utk uto utr uts utt utu uuc uue uur uus uut uuu