b-u bbb bbd bbe bbo bbt bbu bdb bdd bde bdo bdt bdu be- beb bed bee beo bet beu bob bod boe boo bot bou btb btd bte bto btt btu bub bud bue buo but buu dbb dbd dbe dbo dbt dbu ddb ddd dde ddo ddt ddu de- deb ded dee deo det deu dob dod doe doo dot dou dtb dtd dte dto dtt dtu dub dud due duo dut ebb ebd ebe ebo ebt ebu ed- edb edd ede edo edt edu eeb eed eee eeo eet eo- eob eod eoe eoo eot eou etb etd ete eto ett etu eu- eub eud eue eut ob- obb obd obe obo obt obu odb odd ode odo odt odu oeb oed oee oeo oet oo- oob ood ooo oot ot- otb otd ote oto ott otu ou- oud oue ouo out tbb tbd tbe tbo tbt tbu tdb tdd tde tdo tdt tdu te- teb ted tee teo tet teu to- tob tod toe too tot tou ttb ttd tte tto ttt ttu tub tud tue tuo tut tuu ubb ube ubo ubt ubu udb udd ude udo udt udu ueb ued uee uet uob uod uoe uoo uot utb utd ute uto utt utu uue uut uuu