a-a a-i a-t aaa aai aas aat aax ai- aia aii ais ait aix as- asa asi ass ast asx at- ata ati ats att atx ax- axa axi axs axt axx ia- iaa iai ias iat iia iii iis iit iix is- isa isi iss ist ita iti its itt itx ixi saa sai sas sat sax sia sii sis sit six ss- ssa ssi sss sst ssx sta sti sts stt stx sxi sxs sxt t-x taa tai tas tat tax tia tii tis tit tix tsa tsi tss tst tsx tta tti tts ttt ttx txi txs txt xaa xas xat xia xii xis xit xix xsa xsi xss xst xti xts xtx xxi xxx