-er a-a a-i a-t aaa aae aai aao aap aar aat aax aea aee aei aeo aep aer aet aex ai- aia aie aii aio aip air ait aix aoa aoe aoi aoo aop aor aot aox ap- apa ape api apo app apr apt apx ar- ara are ari aro arp arr art arx at- ata ate ati ato atp atr att atx ax- axa axe axi axo axp axr axt axx eaa eae eai eao eap ear eat eax eea eee eeo eep eer eet eex eia eie eii eio eip eir eit eix eo- eoa eoe eoi eoo eop eor eot ep- epa epe epi epo epp epr ept epx era ere eri ero erp err ert eta ete eti eto etp etr ett etx ex- exa exe exi exo exp exr ext exx ia- iaa iae iai iao iap iar iat ie- iea iee iei iep ier iet iex iia iie iii iio iip iir iit iix io- ioa ioe ioi ioo iop ior iot ipa ipe ipi ipo ipp ipr ipt ipx ir- ira ire iri iro irp irr irt irx ita ite iti ito itp itt itx ixe ixi o-i oaa oae oai oao oap oar oat oax oea oee oei oeo oep oer oet oex oia oie oii oio oip oir oit oo- ooa ooi ooo oop oor oot oox op- opa ope opi opo opp opr opt opx or- ora ore ori oro orp orr ort orx ot- ota ote oti oto otp otr ott ox- oxa oxi oxo oxt oxx p-p paa pae pai pao pap par pat pax pea pee pei peo pep per pet pex pia pie pii pio pip pir pit pix poa poe poi poo pop por pot pox ppa ppe ppi ppo ppp ppr ppt ppx pra pre pri pro prp prr prt prx pt- pta pte pti pto ptp ptr ptt ptx pxe pxr pxt ra- raa rae rai rao rap rar rat rax re- rea ree rei reo rep rer ret rex ria rie rii rio rip rir rit rix roa roe roi roo rop ror rot rox rpa rpe rpi rpo rpp rpr rpt rpx rra rri rrp rrr rrt rta rte rti rto rtp rtr rtt rtx rxp rxr t-x taa tae tai tao tap tar tat tax te- tea tee tei teo tep ter tet tex tia tie tii tio tip tir tit tix to- toa toe toi too top tor tot tox tpa tpe tpi tpo tpp tpr tpt tpx tra tre tri tro trp trr trt trx tta tte tti tto ttp ttr ttt ttx txe txi txt xaa xap xar xat xee xep xer xet xex xia xie xii xio xit xix xoa xoi xoo xop xor xot xox xpa xpe xpo xpp xpt xrt xrx xti xtp xtr xtx xxi xxo xxp xxx