a-a a-i a-t aaa aai aap aas aat aax ai- aia aii aip ais ait aix ap- apa api app aps apt apx as- asa asi asp ass ast asx at- ata ati atp ats att atx ax- axa axi axp axs axt axx ia- iaa iai iap ias iat iia iii iip iis iit iix ipa ipi ipp ips ipt ipx is- isa isi isp iss ist ita iti itp its itt itx ixi p-p paa pai pap pas pat pax pia pii pip pis pit pix ppa ppi ppp pps ppt ppx ps- psa psi psp pss pst psx pt- pta pti ptp pts ptt ptx pxs pxt saa sai sap sas sat sax sia sii sip sis sit six spa spi spp sps spt spx ss- ssa ssi ssp sss sst ssx sta sti stp sts stt stx sxi sxs sxt t-x taa tai tap tas tat tax tia tii tip tis tit tix tpa tpi tpp tps tpt tpx tsa tsi tsp tss tst tsx tta tti ttp tts ttt ttx txi txs txt xaa xap xas xat xia xii xis xit xix xpa xpp xps xpt xsa xsi xsp xss xst xti xtp xts xtx xxi xxp xxx