a-a a-b a-i a-t aaa aab aad aae aai aao aat ab- aba abb abd abe abi abo abt ad- ada adb add ade adi ado adt aea aeb aed aee aei aeo aet ai- aia aib aid aie aii aio ait aoa aob aod aoe aoi aoo aot at- ata atb atd ate ati ato att baa bab bad bae bai bao bat bba bbb bbd bbe bbi bbo bbt bda bdb bdd bde bdi bdo bdt be- bea beb bed bee bei beo bet bi- bia bib bid bie bii bio bit boa bob bod boe boi boo bot bta btb btd bte bti bto btt daa dab dad dae dai dao dat dba dbb dbd dbe dbi dbo dbt dda ddb ddd dde ddi ddo ddt de- dea deb ded dee dei deo det di- dia dib did die dii dio dit doa dob dod doe doi doo dot dta dtb dtd dte dti dto dtt eaa eab ead eae eai eao eat eba ebb ebd ebe ebi ebo ebt ed- eda edb edd ede edi edo edt eea eeb eed eee eeo eet eia eib eid eie eii eio eit eo- eoa eob eod eoe eoi eoo eot eta etb etd ete eti eto ett i-d ia- iaa iab iad iae iai iao iat iba ibb ibd ibe ibi ibo ibt ida idb idd ide idi ido idt ie- iea ied iee iei iet iia iib iid iie iii iio iit io- ioa iob iod ioe ioi ioo iot ita itb itd ite iti ito itt o-i oaa oab oad oae oai oao oat ob- oba obb obd obe obi obo obt oda odb odd ode odi odo odt oea oeb oed oee oei oeo oet oia oib oid oie oii oio oit oo- ooa oob ood ooi ooo oot ot- ota otb otd ote oti oto ott taa tab tad tae tai tao tat tba tbb tbd tbe tbi tbo tbt tda tdb tdd tde tdi tdo tdt te- tea teb ted tee tei teo tet tia tib tid tie tii tio tit to- toa tob tod toe toi too tot tta ttb ttd tte tti tto ttt