-er a-a a-i a-t aaa aae aai aao aar aat aax aea aee aei aeo aer aet aex ai- aia aie aii aio air ait aix aoa aoe aoi aoo aor aot aox ar- ara are ari aro arr art arx at- ata ate ati ato atr att atx ax- axa axe axi axo axr axt axx eaa eae eai eao ear eat eax eea eee eeo eer eet eex eia eie eii eio eir eit eix eo- eoa eoe eoi eoo eor eot era ere eri ero err ert eta ete eti eto etr ett etx ex- exa exe exi exo exr ext exx ia- iaa iae iai iao iar iat ie- iea iee iei ier iet iex iia iie iii iio iir iit iix io- ioa ioe ioi ioo ior iot ir- ira ire iri iro irr irt irx ita ite iti ito itt itx ixe ixi o-i oaa oae oai oao oar oat oax oea oee oei oeo oer oet oex oia oie oii oio oir oit oo- ooa ooi ooo oor oot oox or- ora ore ori oro orr ort orx ot- ota ote oti oto otr ott ox- oxa oxi oxo oxt oxx ra- raa rae rai rao rar rat rax re- rea ree rei reo rer ret rex ria rie rii rio rir rit rix roa roe roi roo ror rot rox rra rri rrr rrt rta rte rti rto rtr rtt rtx rxr t-x taa tae tai tao tar tat tax te- tea tee tei teo ter tet tex tia tie tii tio tir tit tix to- toa toe toi too tor tot tox tra tre tri tro trr trt trx tta tte tti tto ttr ttt ttx txe txi txt xaa xar xat xee xer xet xex xia xie xii xio xit xix xoa xoi xoo xor xot xox xrt xrx xti xtr xtx xxi xxo xxx