-er c-- ccc cce ccf cco ccr ccs cct ccu ce- cec cee cef ceo cer ces cet ceu cfc cfe cff cfo cfr cfs cft cfu co- coc coe cof coo cor cos cot cou crc cre crf cro crr crs crt cru csc cse csf cso csr css cst csu ctc cte ctf cto ctr cts ctt ctu cuc cue cuf cuo cur cus cut cuu ec- ecc ece ecf eco ecr ecs ect ecu eec eee eef eeo eer ees eet ef- efc efe eff efo efr efs eft eo- eoc eoe eof eoo eor eos eot eou erc ere erf ero err ers ert eru es- esc ese esf eso esr ess est esu etc ete etf eto etr ets ett etu eu- euc eue euf eur eus eut fcc fce fcf fco fcr fcs fct fcu fec fee fef feo fer fes fet feu ffc ffe fff ffo ffr ffs fft ffu foc foe fof foo for fos fot fou frc fre frf fro frr frs frt fru fsc fse fsf fso fsr fss fst fsu ftc fte ftf fto ftr fts ftt ftu fue fuf fuo fur fus fut fuu oc- occ ocf oco ocr ocs oct ocu oec oee oef oeo oer oes oet of- ofc ofe off ofo ofr ofs oft ofu oo- ooc oof ooo oor oos oot or- orc ore orf oro orr ors ort oru os- osc ose osf oso osr oss ost osu ot- otc ote otf oto otr ots ott otu ou- ouc oue ouf ouo our ous out rcc rce rcf rco rcr rcs rct rcu re- rec ree ref reo rer res ret reu rfc rfe rff rfo rfr rfs rft rfu roc roe rof roo ror ros rot rou rrc rrf rrr rrs rrt rru rsc rse rsf rso rsr rss rst rsu rtc rte rtf rto rtr rts rtt rtu ruc rue ruf ruo rur rus rut ruu scc sce scf sco scr scs sct scu se- sec see sef seo ser ses set seu sfc sfe sff sfo sfr sfs sft sfu soc soe sof soo sor sos sot sou sr- src sre srf sro srr srs srt ss- ssc sse ssf sso ssr sss sst ssu stc ste stf sto str sts stt stu suc sue suf suo sur sus sut suu tcc tce tcf tco tcr tcs tct tcu te- tec tee tef teo ter tes tet teu tfc tfe tff tfo tfr tfs tft tfu to- toc toe tof too tor tos tot tou trc tre trf tro trr trs trt tru tsc tse tsf tso tsr tss tst tsu ttc tte ttf tto ttr tts ttt ttu tuc tue tuf tuo tur tus tut tuu ucc uce ucf uco ucr ucs uct ucu uec uee uef uer ues uet ufc ufe uff ufo ufr ufs uft ufu uoc uoe uoo uor uos uot ur- urc ure urf uro urr urs urt uru usc use usf uso usr uss ust usu utc ute utf uto utr uts utt utu uuc uue uur uus uut uuu