-er a-a a-i a-t aaa aae aaf aai aao aar aat aax aea aee aef aei aeo aer aet aex af- afa afe aff afi afo afr aft afx ai- aia aie aif aii aio air ait aix aoa aoe aof aoi aoo aor aot aox ar- ara are arf ari aro arr art arx at- ata ate atf ati ato atr att atx ax- axa axe axi axo axr axt axx eaa eae eaf eai eao ear eat eax eea eee eef eeo eer eet eex ef- efa efe eff efi efo efr eft efx eia eie eif eii eio eir eit eix eo- eoa eoe eof eoi eoo eor eot era ere erf eri ero err ert eta ete etf eti eto etr ett etx ex- exa exe exi exo exr ext exx faa fae faf fai fao far fat fax fea fee fef fei feo fer fet fex ffa ffe fff ffi ffo ffr fft ffx fia fie fif fii fir fit fix foa foe fof foi foo for fot fox fra fre frf fri fro frr frt fta fte ftf fti fto ftr ftt ftx fxe fxi fxr fxt fxx i-f ia- iaa iae iaf iai iao iar iat ie- iea iee ief iei ier iet iex ifa ife iff ifi ifo ifr ift ifx iia iie iif iii iio iir iit iix io- ioa ioe iof ioi ioo ior iot ir- ira ire irf iri iro irr irt irx ita ite itf iti ito itt itx ixe ixi o-i oaa oae oaf oai oao oar oat oax oea oee oef oei oeo oer oet oex of- ofa ofe off ofi ofo ofr oft ofx oia oie oif oii oio oir oit oo- ooa oof ooi ooo oor oot oox or- ora ore orf ori oro orr ort orx ot- ota ote otf oti oto otr ott ox- oxa oxf oxi oxo oxt oxx ra- raa rae raf rai rao rar rat rax re- rea ree ref rei reo rer ret rex rfa rfe rff rfi rfo rfr rft ria rie rif rii rio rir rit rix roa roe rof roi roo ror rot rox rra rrf rri rrr rrt rta rte rtf rti rto rtr rtt rtx rxr t-x taa tae taf tai tao tar tat tax te- tea tee tef tei teo ter tet tex tfa tfe tff tfi tfo tfr tft tfx tia tie tif tii tio tir tit tix to- toa toe tof toi too tor tot tox tra tre trf tri tro trr trt trx tta tte ttf tti tto ttr ttt ttx txe txf txi txt xaa xaf xar xat xee xer xet xex xfa xfe xft xfx xia xie xii xio xit xix xoa xof xoi xoo xor xot xox xrf xrt xrx xtf xti xtr xtx xxi xxo xxx