a-a a-i a-t aaa aaf aai aar aas aat aau aax af- afa aff afi afr afs aft afu afx ai- aia aif aii air ais ait aiu aix ar- ara arf ari arr ars art aru arx as- asa asf asi asr ass ast asu asx at- ata atf ati atr ats att atu atx au- aua auf aui aur aus aut aux ax- axa axi axr axs axt axx faa faf fai far fas fat fau fax ffa fff ffi ffr ffs fft ffu ffx fia fif fii fir fis fit fiu fix fra frf fri frr frs frt fru fsa fsf fsi fsr fss fst fsu fsx fta ftf fti ftr fts ftt ftu ftx fua fuf fui fur fus fut fuu fux fxi fxr fxs fxt fxu fxx i-f ia- iaa iaf iai iar ias iat iau ifa iff ifi ifr ifs ift ifu ifx iia iif iii iir iis iit iiu iix ir- ira irf iri irr irs irt iru irx is- isa isf isi isr iss ist isu ita itf iti its itt itu itx iu- iua iui iur ius iut ixi ra- raa raf rai rar ras rat rau rax rfa rff rfi rfr rfs rft rfu ria rif rii rir ris rit rix rra rrf rri rrr rrs rrt rru rsa rsf rsi rsr rss rst rsu rsx rta rtf rti rtr rts rtt rtu rtx rua ruf rui rur rus rut ruu rux rxr rxs saa saf sai sar sas sat sau sax sfa sff sfi sfr sfs sft sfu sfx sia sif sii sir sis sit siu six sr- sra srf sri srr srs srt srx ss- ssa ssf ssi ssr sss sst ssu ssx sta stf sti str sts stt stu stx sua suf sui sur sus sut suu sux sxi sxs sxt sxu t-x taa taf tai tar tas tat tau tax tfa tff tfi tfr tfs tft tfu tfx tia tif tii tir tis tit tiu tix tra trf tri trr trs trt tru trx tsa tsf tsi tsr tss tst tsu tsx tta ttf tti ttr tts ttt ttu ttx tua tuf tui tur tus tut tuu tux txf txi txs txt txu ua- uaa uaf uai uar uas uat uau ufa uff ufi ufr ufs uft ufu ufx uia uif uii uir uis uit uiu ur- ura urf uri urr urs urt uru urx usa usf usi usr uss ust usu usx uta utf uti utr uts utt utu utx uua uur uus uut uuu uxf uxr uxt uxu xaa xaf xar xas xat xau xfa xfs xft xfx xia xii xis xit xiu xix xrf xrt xrx xsa xsi xss xst xtf xti xtr xts xtx xui xus xxi xxx