b-u bbb bbd bbe bbl bbt bbu bdb bdd bde bdl bdt bdu be- beb bed bee bel bet beu blb bld ble bll blt blu btb btd bte btl btt btu bub bud bue bul but buu dbb dbd dbe dbl dbt dbu ddb ddd dde ddl ddt ddu de- deb ded dee del det deu dl- dlb dld dle dll dlt dlu dtb dtd dte dtl dtt dtu dub dud due dul dut ebb ebd ebe ebl ebt ebu ed- edb edd ede edl edt edu eeb eed eee eel eet elb eld ele ell elt elu etb etd ete etl ett etu eu- eub eud eue eul eut lbb lbd lbe lbl lbt lbu ldb ldd lde ldl ldt ldu leb led lee lel let leu llb lld lle lll llt llu ltb ltd lte ltl ltt ltu lub lud lue lul lut luu tbb tbd tbe tbl tbt tbu tdb tdd tde tdl tdt tdu te- teb ted tee tel tet teu tld tle tll tlt tlu ttb ttd tte ttl ttt ttu tub tud tue tul tut tuu ubb ube ubl ubt ubu udb udd ude udl udt udu ueb ued uee uel uet ulb uld ule ull ult ulu utb utd ute utl utt utu uue uut uuu