a-a a-b a-t aaa aab aad aae aao aat aau aax ab- aba abb abd abe abo abt abu abx ad- ada adb add ade ado adt adu adx aea aeb aed aee aeo aet aeu aex aoa aob aod aoe aoo aot aou aox at- ata atb atd ate ato att atu atx au- aua aub aud aue auo aut aux ax- axa axe axo axt axx b-u baa bab bad bae bao bat bau bax bba bbb bbd bbe bbo bbt bbu bbx bda bdb bdd bde bdo bdt bdu bdx be- bea beb bed bee beo bet beu bex boa bob bod boe boo bot bou box bta btb btd bte bto btt btu btx bua bub bud bue buo but buu bux bxb bxd bxo bxx daa dab dad dae dao dat dau dax dba dbb dbd dbe dbo dbt dbu dbx dda ddb ddd dde ddo ddt ddu ddx de- dea deb ded dee deo det deu dex doa dob dod doe doo dot dou dox dta dtb dtd dte dto dtt dtu dtx dua dub dud due duo dut dux dxd dxo dxt dxx eaa eab ead eae eao eat eau eax eba ebb ebd ebe ebo ebt ebu ebx ed- eda edb edd ede edo edt edu edx eea eeb eed eee eeo eet eex eo- eoa eob eod eoe eoo eot eou eta etb etd ete eto ett etu etx eu- eua eub eud eue eut eux ex- exa exd exe exo ext exu exx oaa oab oad oae oao oat oau oax ob- oba obb obd obe obo obt obu obx oda odb odd ode odo odt odu oea oeb oed oee oeo oet oex oo- ooa oob ood ooo oot oox ot- ota otb otd ote oto ott otu ou- oua oud oue ouo out ox- oxa oxb oxo oxt oxx t-x taa tab tad tae tao tat tau tax tba tbb tbd tbe tbo tbt tbu tda tdb tdd tde tdo tdt tdu tdx te- tea teb ted tee teo tet teu tex to- toa tob tod toe too tot tou tox tta ttb ttd tte tto ttt ttu ttx tua tub tud tue tuo tut tuu tux txe txt txu ua- uaa uab uad uae uao uat uau uba ubb ube ubo ubt ubu ubx uda udb udd ude udo udt udu udx uea ueb ued uee uet uoa uob uod uoe uoo uot uox uta utb utd ute uto utt utu utx uua uue uut uuu uxb uxo uxt uxu xaa xad xat xau xbe xbx xda xdb xde xdt xed xee xet xeu xex xoa xod xoo xot xox xtx xue xxo xxx