a-a a-b a-t aaa aab aad aag aao aat aau ab- aba abb abd abg abo abt abu ad- ada adb add adg ado adt adu ag- aga agb agd agg ago agt agu aoa aob aod aog aoo aot aou at- ata atb atd atg ato att atu au- aua aub aud aug auo aut b-u baa bab bad bag bao bat bau bba bbb bbd bbg bbo bbt bbu bda bdb bdd bdg bdo bdt bdu bga bgb bgd bgg bgo bgt bgu boa bob bod bog boo bot bou bta btb btd btg bto btt btu bua bub bud bug buo but buu daa dab dad dag dao dat dau dba dbb dbd dbg dbo dbt dbu dda ddb ddd ddg ddo ddt ddu dga dgd dgg dgt dgu doa dob dod dog doo dot dou dta dtb dtd dtg dto dtt dtu dua dub dud dug duo dut g-d gaa gab gad gag gao gat gau gba gbd gbg gbo gbt gbu gda gdb gdd gdo gdt gdu gga ggb ggd ggg ggo ggt ggu goa gob god gog goo got gou gta gtb gtd gtg gto gtt gtu gu- gua gub gud gug guo gut guu oaa oab oad oag oao oat oau ob- oba obb obd obg obo obt obu oda odb odd odg odo odt odu oga ogd ogg ogo ogt oo- ooa oob ood oog ooo oot ot- ota otb otd otg oto ott otu ou- oua oud ouo out taa tab tad tag tao tat tau tba tbb tbd tbg tbo tbt tbu tda tdb tdd tdg tdo tdt tdu tga tgb tgg tgo tgt tgu to- toa tob tod tog too tot tou tta ttb ttd ttg tto ttt ttu tua tub tud tug tuo tut tuu ua- uaa uab uad uag uao uat uau uba ubb ubg ubo ubt ubu uda udb udd udg udo udt udu uga ugb ugg ugo ugt ugu uoa uob uod uog uoo uot uta utb utd uto utt utu uua uug uut uuu