-er c-- ccc cce ccf cck ccr ccs cct ccu ce- cec cee cef cek cer ces cet ceu cfc cfe cff cfk cfr cfs cft cfu ckc cks ckt crc cre crf crk crr crs crt cru csc cse csf csk csr css cst csu ctc cte ctf ctk ctr cts ctt ctu cuc cue cuf cuk cur cus cut cuu ec- ecc ece ecf eck ecr ecs ect ecu eec eee eef eek eer ees eet ef- efc efe eff efr efs eft ekc eke ekf ekr eks ekt eku erc ere erf erk err ers ert eru es- esc ese esf esk esr ess est esu etc ete etf etk etr ets ett etu eu- euc eue euf eur eus eut fcc fce fcf fck fcr fcs fct fcu fec fee fef fek fer fes fet feu ffc ffe fff ffk ffr ffs fft ffu fkc fkf fkk fkt frc fre frf frk frr frs frt fru fsc fse fsf fsk fsr fss fst fsu ftc fte ftf ftk ftr fts ftt ftu fue fuf fuk fur fus fut fuu k-t kcc kce kck kcr kcs kct kcu ke- kec kee kef kek ker kes ket kfc kff kfs kfu kkc kke kkk kkr kks kkt kku krc krf krk krr krs krt kru ksc kse ksf ksk ksr kss kst ksu ktc kte ktf ktk ktr kts ktt ktu kuc kue kuk kur kus kut kuu rcc rce rcf rcr rcs rct rcu re- rec ree ref rek rer res ret reu rfc rfe rff rfk rfr rfs rft rfu rkc rke rkf rkk rks rkt rku rrc rrf rrk rrr rrs rrt rru rsc rse rsf rsk rsr rss rst rsu rtc rte rtf rtk rtr rts rtt rtu ruc rue ruf ruk rur rus rut ruu scc sce scf sck scr scs sct scu se- sec see sef sek ser ses set seu sfc sfe sff sfk sfr sfs sft sfu sk- skc ske skf skk skr sks skt sku sr- src sre srf srk srr srs srt ss- ssc sse ssf ssk ssr sss sst ssu stc ste stf stk str sts stt stu suc sue suf suk sur sus sut suu tcc tce tcf tck tcr tcs tct tcu te- tec tee tef tek ter tes tet teu tfc tfe tff tfk tfr tfs tft tfu tkc tke tkk tkr tks tkt trc tre trf trk trr trs trt tru tsc tse tsf tsk tsr tss tst tsu ttc tte ttf ttk ttr tts ttt ttu tuc tue tuf tuk tur tus tut tuu ucc uce ucf uck ucr ucs uct ucu uec uee uef uer ues uet ufc ufe uff ufr ufs uft ufu ukc uke ukf ukk ukr uku ur- urc ure urf urk urr urs urt uru usc use usf usk usr uss ust usu utc ute utf utk utr uts utt utu uuc uue uur uus uut uuu