a-a a-c a-t aaa aac aaf aar aas aat aau ac- aca acc acf acr acs act acu af- afa afc aff afr afs aft afu ar- ara arc arf arr ars art aru as- asa asc asf asr ass ast asu at- ata atc atf atr ats att atu au- aua auc auf aur aus aut c-- caa cac caf car cas cat cau cca ccc ccf ccr ccs cct ccu cfa cfc cff cfr cfs cft cfu cra crc crf crr crs crt cru csa csc csf csr css cst csu cta ctc ctf ctr cts ctt ctu cua cuc cuf cur cus cut cuu faa fac faf far fas fat fau fca fcc fcf fcr fcs fct fcu ffa ffc fff ffr ffs fft ffu fra frc frf frr frs frt fru fsa fsc fsf fsr fss fst fsu fta ftc ftf ftr fts ftt ftu fua fuf fur fus fut fuu ra- raa rac raf rar ras rat rau rca rcc rcf rcr rcs rct rcu rfa rfc rff rfr rfs rft rfu rra rrc rrf rrr rrs rrt rru rsa rsc rsf rsr rss rst rsu rta rtc rtf rtr rts rtt rtu rua ruc ruf rur rus rut ruu saa sac saf sar sas sat sau sca scc scf scr scs sct scu sfa sfc sff sfr sfs sft sfu sr- sra src srf srr srs srt ss- ssa ssc ssf ssr sss sst ssu sta stc stf str sts stt stu sua suc suf sur sus sut suu taa tac taf tar tas tat tau tca tcc tcf tcr tcs tct tcu tfa tfc tff tfr tfs tft tfu tra trc trf trr trs trt tru tsa tsc tsf tsr tss tst tsu tta ttc ttf ttr tts ttt ttu tua tuc tuf tur tus tut tuu ua- uaa uac uaf uar uas uat uau uca ucc ucf ucr ucs uct ucu ufa ufc uff ufr ufs uft ufu ur- ura urc urf urr urs urt uru usa usc usf usr uss ust usu uta utc utf utr uts utt utu uua uuc uur uus uut uuu