a-a a-i a-t aaa aai aao aap aar aat aax ai- aia aii aio aip air ait aix aoa aoi aoo aop aor aot aox ap- apa api apo app apr apt apx ar- ara ari aro arp arr art arx at- ata ati ato atp atr att atx ax- axa axi axo axp axr axt axx ia- iaa iai iao iap iar iat iia iii iio iip iir iit iix io- ioa ioi ioo iop ior iot ipa ipi ipo ipp ipr ipt ipx ir- ira iri iro irp irr irt irx ita iti ito itp itt itx ixi o-i oaa oai oao oap oar oat oax oia oii oio oip oir oit oo- ooa ooi ooo oop oor oot oox op- opa opi opo opp opr opt opx or- ora ori oro orp orr ort orx ot- ota oti oto otp otr ott ox- oxa oxi oxo oxt oxx p-p paa pai pao pap par pat pax pia pii pio pip pir pit pix poa poi poo pop por pot pox ppa ppi ppo ppp ppr ppt ppx pra pri pro prp prr prt prx pt- pta pti pto ptp ptr ptt ptx pxr pxt ra- raa rai rao rap rar rat rax ria rii rio rip rir rit rix roa roi roo rop ror rot rox rpa rpi rpo rpp rpr rpt rpx rra rri rrp rrr rrt rta rti rto rtp rtr rtt rtx rxp rxr t-x taa tai tao tap tar tat tax tia tii tio tip tir tit tix to- toa toi too top tor tot tox tpa tpi tpo tpp tpr tpt tpx tra tri tro trp trr trt trx tta tti tto ttp ttr ttt ttx txi txt xaa xap xar xat xia xii xio xit xix xoa xoi xoo xop xor xot xox xpa xpo xpp xpt xrt xrx xti xtp xtr xtx xxi xxo xxp xxx