a-a a-b a-t aaa aab aad aae aao aat aau ab- aba abb abd abe abo abt abu ad- ada adb add ade ado adt adu aea aeb aed aee aeo aet aeu aoa aob aod aoe aoo aot aou at- ata atb atd ate ato att atu au- aua aub aud aue auo aut b-u baa bab bad bae bao bat bau bba bbb bbd bbe bbo bbt bbu bda bdb bdd bde bdo bdt bdu be- bea beb bed bee beo bet beu boa bob bod boe boo bot bou bta btb btd bte bto btt btu bua bub bud bue buo but buu daa dab dad dae dao dat dau dba dbb dbd dbe dbo dbt dbu dda ddb ddd dde ddo ddt ddu de- dea deb ded dee deo det deu doa dob dod doe doo dot dou dta dtb dtd dte dto dtt dtu dua dub dud due duo dut eaa eab ead eae eao eat eau eba ebb ebd ebe ebo ebt ebu ed- eda edb edd ede edo edt edu eea eeb eed eee eeo eet eo- eoa eob eod eoe eoo eot eou eta etb etd ete eto ett etu eu- eua eub eud eue eut oaa oab oad oae oao oat oau ob- oba obb obd obe obo obt obu oda odb odd ode odo odt odu oea oeb oed oee oeo oet oo- ooa oob ood ooo oot ot- ota otb otd ote oto ott otu ou- oua oud oue ouo out taa tab tad tae tao tat tau tba tbb tbd tbe tbo tbt tbu tda tdb tdd tde tdo tdt tdu te- tea teb ted tee teo tet teu to- toa tob tod toe too tot tou tta ttb ttd tte tto ttt ttu tua tub tud tue tuo tut tuu ua- uaa uab uad uae uao uat uau uba ubb ube ubo ubt ubu uda udb udd ude udo udt udu uea ueb ued uee uet uoa uob uod uoe uoo uot uta utb utd ute uto utt utu uua uue uut uuu