a-a a-b a-i a-t aaa aab aad aai aao aat ab- aba abb abd abi abo abt ad- ada adb add adi ado adt ai- aia aib aid aii aio ait aoa aob aod aoi aoo aot at- ata atb atd ati ato att baa bab bad bai bao bat bba bbb bbd bbi bbo bbt bda bdb bdd bdi bdo bdt bi- bia bib bid bii bio bit boa bob bod boi boo bot bta btb btd bti bto btt daa dab dad dai dao dat dba dbb dbd dbi dbo dbt dda ddb ddd ddi ddo ddt di- dia dib did dii dio dit doa dob dod doi doo dot dta dtb dtd dti dto dtt i-d ia- iaa iab iad iai iao iat iba ibb ibd ibi ibo ibt ida idb idd idi ido idt iia iib iid iii iio iit io- ioa iob iod ioi ioo iot ita itb itd iti ito itt o-i oaa oab oad oai oao oat ob- oba obb obd obi obo obt oda odb odd odi odo odt oia oib oid oii oio oit oo- ooa oob ood ooi ooo oot ot- ota otb otd oti oto ott taa tab tad tai tao tat tba tbb tbd tbi tbo tbt tda tdb tdd tdi tdo tdt tia tib tid tii tio tit to- toa tob tod toi too tot tta ttb ttd tti tto ttt