a-a a-t aaa aaf aar aas aat aau aax af- afa aff afr afs aft afu afx ar- ara arf arr ars art aru arx as- asa asf asr ass ast asu asx at- ata atf atr ats att atu atx au- aua auf aur aus aut aux ax- axa axr axs axt axx faa faf far fas fat fau fax ffa fff ffr ffs fft ffu ffx fra frf frr frs frt fru fsa fsf fsr fss fst fsu fsx fta ftf ftr fts ftt ftu ftx fua fuf fur fus fut fuu fux fxr fxs fxt fxu fxx ra- raa raf rar ras rat rau rax rfa rff rfr rfs rft rfu rra rrf rrr rrs rrt rru rsa rsf rsr rss rst rsu rsx rta rtf rtr rts rtt rtu rtx rua ruf rur rus rut ruu rux rxr rxs saa saf sar sas sat sau sax sfa sff sfr sfs sft sfu sfx sr- sra srf srr srs srt srx ss- ssa ssf ssr sss sst ssu ssx sta stf str sts stt stu stx sua suf sur sus sut suu sux sxs sxt sxu t-x taa taf tar tas tat tau tax tfa tff tfr tfs tft tfu tfx tra trf trr trs trt tru trx tsa tsf tsr tss tst tsu tsx tta ttf ttr tts ttt ttu ttx tua tuf tur tus tut tuu tux txf txs txt txu ua- uaa uaf uar uas uat uau ufa uff ufr ufs uft ufu ufx ur- ura urf urr urs urt uru urx usa usf usr uss ust usu usx uta utf utr uts utt utu utx uua uur uus uut uuu uxf uxr uxt uxu xaa xaf xar xas xat xau xfa xfs xft xfx xrf xrt xrx xsa xss xst xtf xtr xts xtx xus xxx