-er a-a a-t aaa aad aae aao aar aat aax ad- ada add ade ado adr adt adx aea aed aee aeo aer aet aex aoa aod aoe aoo aor aot aox ar- ara ard are aro arr art arx at- ata atd ate ato atr att atx ax- axa axe axo axr axt axx daa dad dae dao dar dat dax dda ddd dde ddo ddr ddt ddx de- dea ded dee deo der det dex doa dod doe doo dor dot dox dra drd dre dro drr drt drx dta dtd dte dto dtr dtt dtx dxd dxo dxr dxt dxx eaa ead eae eao ear eat eax ed- eda edd ede edo edr edt edx eea eed eee eeo eer eet eex eo- eoa eod eoe eoo eor eot era erd ere ero err ert eta etd ete eto etr ett etx ex- exa exd exe exo exr ext exx oaa oad oae oao oar oat oax oda odd ode odo odr odt oea oed oee oeo oer oet oex oo- ooa ood ooo oor oot oox or- ora ord ore oro orr ort orx ot- ota otd ote oto otr ott ox- oxa oxo oxt oxx ra- raa rad rae rao rar rat rax rda rdd rde rdo rdr rdt rdx re- rea red ree reo rer ret rex roa rod roe roo ror rot rox rra rrd rrr rrt rta rtd rte rto rtr rtt rtx rxr t-x taa tad tae tao tar tat tax tda tdd tde tdo tdr tdt tdx te- tea ted tee teo ter tet tex to- toa tod toe too tor tot tox tra trd tre tro trr trt trx tta ttd tte tto ttr ttt ttx txe txt xaa xad xar xat xda xde xdr xdt xed xee xer xet xex xoa xod xoo xor xot xox xrd xrt xrx xtr xtx xxo xxx