-er a-a a-i aaa aad aae aai aao aar aax ad- ada add ade adi ado adr adx aea aed aee aei aeo aer aex ai- aia aid aie aii aio air aix aoa aod aoe aoi aoo aor aox ar- ara ard are ari aro arr arx ax- axa axe axi axo axr axx daa dad dae dai dao dar dax dda ddd dde ddi ddo ddr ddx de- dea ded dee dei deo der dex di- dia did die dii dio dir dix doa dod doe doi doo dor dox dra drd dre dri dro drr drx dxd dxi dxo dxr dxx eaa ead eae eai eao ear eax ed- eda edd ede edi edo edr edx eea eed eee eeo eer eex eia eid eie eii eio eir eix eo- eoa eod eoe eoi eoo eor era erd ere eri ero err ex- exa exd exe exi exo exr exx i-d ia- iaa iad iae iai iao iar ida idd ide idi ido idr idx ie- iea ied iee iei ier iex iia iid iie iii iio iir iix io- ioa iod ioe ioi ioo ior ir- ira ird ire iri iro irr irx ixe ixi o-i oaa oad oae oai oao oar oax oda odd ode odi odo odr oea oed oee oei oeo oer oex oia oid oie oii oio oir oo- ooa ood ooi ooo oor oox or- ora ord ore ori oro orr orx ox- oxa oxi oxo oxx ra- raa rad rae rai rao rar rax rda rdd rde rdi rdo rdr rdx re- rea red ree rei reo rer rex ria rid rie rii rio rir rix roa rod roe roi roo ror rox rra rrd rri rrr rxr xaa xad xar xda xde xdi xdr xed xee xer xex xia xie xii xio xix xoa xod xoi xoo xor xox xrd xrx xxi xxo xxx