-al a-a a-b a-t aaa aab aad aal aat aau ab- aba abb abd abl abt abu ad- ada adb add adl adt adu al- ala alb ald all alt alu at- ata atb atd atl att atu au- aua aub aud aul aut b-u baa bab bad bal bat bau bba bbb bbd bbl bbt bbu bda bdb bdd bdl bdt bdu bla blb bld bll blt blu bta btb btd btl btt btu bua bub bud bul but buu daa dab dad dal dat dau dba dbb dbd dbl dbt dbu dda ddb ddd ddl ddt ddu dl- dla dlb dld dll dlt dlu dta dtb dtd dtl dtt dtu dua dub dud dul dut la- laa lab lad lal lat lau lba lbb lbd lbl lbt lbu lda ldb ldd ldl ldt ldu lla llb lld lll llt llu lta ltb ltd ltl ltt ltu lua lub lud lul lut luu taa tab tad tal tat tau tba tbb tbd tbl tbt tbu tda tdb tdd tdl tdt tdu tla tld tll tlt tlu tta ttb ttd ttl ttt ttu tua tub tud tul tut tuu ua- uaa uab uad ual uat uau uba ubb ubl ubt ubu uda udb udd udl udt udu ula ulb uld ull ult ulu uta utb utd utl utt utu uua uut uuu