-al -ol a-a a-b a-t aaa aab aad aal aao aat aau ab- aba abb abd abl abo abt abu ad- ada adb add adl ado adt adu al- ala alb ald all alo alt alu aoa aob aod aol aoo aot aou at- ata atb atd atl ato att atu au- aua aub aud aul auo aut b-u baa bab bad bal bao bat bau bba bbb bbd bbl bbo bbt bbu bda bdb bdd bdl bdo bdt bdu bla blb bld bll blo blt blu boa bob bod bol boo bot bou bta btb btd btl bto btt btu bua bub bud bul buo but buu daa dab dad dal dao dat dau dba dbb dbd dbl dbo dbt dbu dda ddb ddd ddl ddo ddt ddu dl- dla dlb dld dll dlo dlt dlu doa dob dod dol doo dot dou dta dtb dtd dtl dto dtt dtu dua dub dud dul duo dut la- laa lab lad lal lao lat lau lba lbb lbd lbl lbo lbt lbu lda ldb ldd ldl ldo ldt ldu lla llb lld lll llo llt llu loa lob lod lol loo lot lou lta ltb ltd ltl lto ltt ltu lua lub lud lul luo lut luu oaa oab oad oal oao oat oau ob- oba obb obd obl obo obt obu oda odb odd odl odo odt odu ola olb old oll olo olt olu oo- ooa oob ood ool ooo oot ot- ota otb otd otl oto ott otu ou- oua oud oul ouo out taa tab tad tal tao tat tau tba tbb tbd tbl tbo tbt tbu tda tdb tdd tdl tdo tdt tdu tla tld tll tlo tlt tlu to- toa tob tod tol too tot tou tta ttb ttd ttl tto ttt ttu tua tub tud tul tuo tut tuu ua- uaa uab uad ual uao uat uau uba ubb ubl ubo ubt ubu uda udb udd udl udo udt udu ula ulb uld ull ulo ult ulu uoa uob uod uol uoo uot uta utb utd utl uto utt utu uua uut uuu