-er a-a a-c a-t aaa aac aae aaf aao aar aas aat aau ac- aca acc ace acf aco acr acs act acu aea aec aee aef aeo aer aes aet aeu af- afa afc afe aff afo afr afs aft afu aoa aoc aoe aof aoo aor aos aot aou ar- ara arc are arf aro arr ars art aru as- asa asc ase asf aso asr ass ast asu at- ata atc ate atf ato atr ats att atu au- aua auc aue auf auo aur aus aut c-- caa cac cae caf cao car cas cat cau cca ccc cce ccf cco ccr ccs cct ccu ce- cea cec cee cef ceo cer ces cet ceu cfa cfc cfe cff cfo cfr cfs cft cfu co- coa coc coe cof coo cor cos cot cou cra crc cre crf cro crr crs crt cru csa csc cse csf cso csr css cst csu cta ctc cte ctf cto ctr cts ctt ctu cua cuc cue cuf cuo cur cus cut cuu eaa eac eae eaf eao ear eas eat eau ec- eca ecc ece ecf eco ecr ecs ect ecu eea eec eee eef eeo eer ees eet ef- efa efc efe eff efo efr efs eft eo- eoa eoc eoe eof eoo eor eos eot eou era erc ere erf ero err ers ert eru es- esa esc ese esf eso esr ess est esu eta etc ete etf eto etr ets ett etu eu- eua euc eue euf eur eus eut faa fac fae faf fao far fas fat fau fca fcc fce fcf fco fcr fcs fct fcu fea fec fee fef feo fer fes fet feu ffa ffc ffe fff ffo ffr ffs fft ffu foa foc foe fof foo for fos fot fou fra frc fre frf fro frr frs frt fru fsa fsc fse fsf fso fsr fss fst fsu fta ftc fte ftf fto ftr fts ftt ftu fua fue fuf fuo fur fus fut fuu oaa oac oae oaf oao oar oas oat oau oc- oca occ ocf oco ocr ocs oct ocu oea oec oee oef oeo oer oes oet of- ofa ofc ofe off ofo ofr ofs oft ofu oo- ooa ooc oof ooo oor oos oot or- ora orc ore orf oro orr ors ort oru os- osa osc ose osf oso osr oss ost osu ot- ota otc ote otf oto otr ots ott otu ou- oua ouc oue ouf ouo our ous out ra- raa rac rae raf rao rar ras rat rau rca rcc rce rcf rco rcr rcs rct rcu re- rea rec ree ref reo rer res ret reu rfa rfc rfe rff rfo rfr rfs rft rfu roa roc roe rof roo ror ros rot rou rra rrc rrf rrr rrs rrt rru rsa rsc rse rsf rso rsr rss rst rsu rta rtc rte rtf rto rtr rts rtt rtu rua ruc rue ruf ruo rur rus rut ruu saa sac sae saf sao sar sas sat sau sca scc sce scf sco scr scs sct scu se- sea sec see sef seo ser ses set seu sfa sfc sfe sff sfo sfr sfs sft sfu soa soc soe sof soo sor sos sot sou sr- sra src sre srf sro srr srs srt ss- ssa ssc sse ssf sso ssr sss sst ssu sta stc ste stf sto str sts stt stu sua suc sue suf suo sur sus sut suu taa tac tae taf tao tar tas tat tau tca tcc tce tcf tco tcr tcs tct tcu te- tea tec tee tef teo ter tes tet teu tfa tfc tfe tff tfo tfr tfs tft tfu to- toa toc toe tof too tor tos tot tou tra trc tre trf tro trr trs trt tru tsa tsc tse tsf tso tsr tss tst tsu tta ttc tte ttf tto ttr tts ttt ttu tua tuc tue tuf tuo tur tus tut tuu ua- uaa uac uae uaf uao uar uas uat uau uca ucc uce ucf uco ucr ucs uct ucu uea uec uee uef uer ues uet ufa ufc ufe uff ufo ufr ufs uft ufu uoa uoc uoe uoo uor uos uot ur- ura urc ure urf uro urr urs urt uru usa usc use usf uso usr uss ust usu uta utc ute utf uto utr uts utt utu uua uuc uue uur uus uut uuu