a-a a-i a-t aaa aai aar aas aat aax aay ai- aia aii air ais ait aix aiy ar- ara ari arr ars art arx ary as- asa asi asr ass ast asx asy at- ata ati atr ats att atx ax- axa axi axr axs axt axx ay- aya ayi ayr ays ayt ayx ia- iaa iai iar ias iat iia iii iir iis iit iix ir- ira iri irr irs irt irx iry is- isa isi isr iss ist isy ita iti its itt itx ity ixi ixy iya iyr iys iyt iyy ra- raa rai rar ras rat rax ray ria rii rir ris rit rix riy rra rri rrr rrs rrt rsa rsi rsr rss rst rsx rta rti rtr rts rtt rtx rty rxr rxs ry- rya ryr rys ryy saa sai sar sas sat sax say sia sii sir sis sit six sr- sra sri srr srs srt srx sry ss- ssa ssi ssr sss sst ssx sta sti str sts stt stx sty sxi sxs sxt sy- sya syi syr sys syt syx t-x taa tai tar tas tat tax tay tia tii tir tis tit tix tiy tra tri trr trs trt trx try tsa tsi tsr tss tst tsx tsy tta tti ttr tts ttt ttx tty txi txs txt tya tyr tys tyt xaa xar xas xat xia xii xis xit xix xrt xrx xry xsa xsi xss xst xti xtr xts xtx xty xxi xxx xxy xyr xyy yaa yai yar yas yat yax yay yii yir yis yit yra yrs yrt ysa ysi ysr yss yst ysy yta ytr yts ytt yxa yxy yys yyt yyy