a-a a-i a-t aaa aai aap aar aas aat aax ai- aia aii aip air ais ait aix ap- apa api app apr aps apt apx ar- ara ari arp arr ars art arx as- asa asi asp asr ass ast asx at- ata ati atp atr ats att atx ax- axa axi axp axr axs axt axx ia- iaa iai iap iar ias iat iia iii iip iir iis iit iix ipa ipi ipp ipr ips ipt ipx ir- ira iri irp irr irs irt irx is- isa isi isp isr iss ist ita iti itp its itt itx ixi p-p paa pai pap par pas pat pax pia pii pip pir pis pit pix ppa ppi ppp ppr pps ppt ppx pra pri prp prr prs prt prx ps- psa psi psp psr pss pst psx pt- pta pti ptp ptr pts ptt ptx pxr pxs pxt ra- raa rai rap rar ras rat rax ria rii rip rir ris rit rix rpa rpi rpp rpr rps rpt rpx rra rri rrp rrr rrs rrt rsa rsi rsp rsr rss rst rsx rta rti rtp rtr rts rtt rtx rxp rxr rxs saa sai sap sar sas sat sax sia sii sip sir sis sit six spa spi spp spr sps spt spx sr- sra sri srp srr srs srt srx ss- ssa ssi ssp ssr sss sst ssx sta sti stp str sts stt stx sxi sxs sxt t-x taa tai tap tar tas tat tax tia tii tip tir tis tit tix tpa tpi tpp tpr tps tpt tpx tra tri trp trr trs trt trx tsa tsi tsp tsr tss tst tsx tta tti ttp ttr tts ttt ttx txi txs txt xaa xap xar xas xat xia xii xis xit xix xpa xpp xps xpt xrt xrx xsa xsi xsp xss xst xti xtp xtr xts xtx xxi xxp xxx