a-a a-i a-t aaa aai aao aap aar aas aat aax ai- aia aii aio aip air ais ait aix aoa aoi aoo aop aor aos aot aox ap- apa api apo app apr aps apt apx ar- ara ari aro arp arr ars art arx as- asa asi aso asp asr ass ast asx at- ata ati ato atp atr ats att atx ax- axa axi axo axp axr axs axt axx ia- iaa iai iao iap iar ias iat iia iii iio iip iir iis iit iix io- ioa ioi ioo iop ior ios iot ipa ipi ipo ipp ipr ips ipt ipx ir- ira iri iro irp irr irs irt irx is- isa isi iso isp isr iss ist ita iti ito itp its itt itx ixi o-i oaa oai oao oap oar oas oat oax oia oii oio oip oir ois oit oo- ooa ooi ooo oop oor oos oot oox op- opa opi opo opp opr ops opt opx or- ora ori oro orp orr ors ort orx os- osa osi oso osp osr oss ost osx ot- ota oti oto otp otr ots ott ox- oxa oxi oxo oxt oxx p-p paa pai pao pap par pas pat pax pia pii pio pip pir pis pit pix poa poi poo pop por pos pot pox ppa ppi ppo ppp ppr pps ppt ppx pra pri pro prp prr prs prt prx ps- psa psi pso psp psr pss pst psx pt- pta pti pto ptp ptr pts ptt ptx pxr pxs pxt ra- raa rai rao rap rar ras rat rax ria rii rio rip rir ris rit rix roa roi roo rop ror ros rot rox rpa rpi rpo rpp rpr rps rpt rpx rra rri rrp rrr rrs rrt rsa rsi rso rsp rsr rss rst rsx rta rti rto rtp rtr rts rtt rtx rxp rxr rxs saa sai sao sap sar sas sat sax sia sii sio sip sir sis sit six soa soi soo sop sor sos sot sox spa spi spo spp spr sps spt spx sr- sra sri sro srp srr srs srt srx ss- ssa ssi sso ssp ssr sss sst ssx sta sti sto stp str sts stt stx sxi sxs sxt t-x taa tai tao tap tar tas tat tax tia tii tio tip tir tis tit tix to- toa toi too top tor tos tot tox tpa tpi tpo tpp tpr tps tpt tpx tra tri tro trp trr trs trt trx tsa tsi tso tsp tsr tss tst tsx tta tti tto ttp ttr tts ttt ttx txi txs txt xaa xap xar xas xat xia xii xio xis xit xix xoa xoi xoo xop xor xos xot xox xpa xpo xpp xps xpt xrt xrx xsa xsi xsp xss xst xti xtp xtr xts xtx xxi xxo xxp xxx