-th a-a a-b a-t aaa aab aad aaf aah aao aat aau ab- aba abb abd abf abh abo abt abu ad- ada adb add adf adh ado adt adu af- afa afb afd aff afh afo aft afu aha ahb ahd ahf ahh aho aht ahu aoa aob aod aof aoh aoo aot aou at- ata atb atd atf ath ato att atu au- aua aub aud auf auh auo aut b-u baa bab bad baf bah bao bat bau bba bbb bbd bbf bbh bbo bbt bbu bda bdb bdd bdf bdh bdo bdt bdu bfa bfb bfd bff bfh bfo bft bfu bha bhb bhd bhf bhh bho bht bhu boa bob bod bof boh boo bot bou bta btb btd btf bth bto btt btu bua bub bud buf buh buo but buu daa dab dad daf dah dao dat dau dba dbb dbd dbf dbh dbo dbt dbu dda ddb ddd ddf ddh ddo ddt ddu dfa dfb dfd dff dfh dfo dft dfu dh- dha dhb dhd dhf dhh dho dht dhu doa dob dod dof doh doo dot dou dta dtb dtd dtf dth dto dtt dtu dua dub dud duf duh duo dut faa fab fad faf fah fao fat fau fba fbb fbd fbf fbh fbo fbt fbu fda fdb fdd fdf fdh fdo fdt fdu ffa ffd fff ffh ffo fft ffu fha fhb fhf fhh fho foa fob fof foh foo fot fou fta ftb ftd ftf fth fto ftt ftu fua fub fud fuf fuo fut fuu haa hab had haf hah hao hat hau hba hbb hbd hbf hbh hbo hbt hbu hda hdb hdd hdf hdh hdo hdt hdu hfa hfb hfd hff hfh hfo hft hfu hha hhb hhd hhf hhh hho hht hhu hoa hob hod hof hoh hoo hot hou hta htb htd htf hth hto htt hua hub hud huf huh huo hut huu oaa oab oad oaf oah oao oat oau ob- oba obb obd obf obh obo obt obu oda odb odd odf odh odo odt odu of- ofa ofb ofd off ofo oft ofu oha ohd ohf ohh oho oht ohu oo- ooa oob ood oof ooh ooo oot ot- ota otb otd otf oth oto ott otu ou- oua oud ouf ouh ouo out taa tab tad taf tah tao tat tau tba tbb tbd tbf tbh tbo tbt tbu tda tdb tdd tdf tdh tdo tdt tdu tfa tfb tfd tff tfh tfo tft tfu th- tha thb thd thf thh tho tht thu to- toa tob tod tof toh too tot tou tta ttb ttd ttf tth tto ttt ttu tua tub tud tuf tuh tuo tut tuu ua- uaa uab uad uaf uah uao uat uau uba ubb ubf ubh ubo ubt ubu uda udb udd udf udo udt udu ufa ufd uff ufh ufo uft ufu uha uhb uhd uhf uhh uho uht uhu uoa uob uod uoo uot uta utb utd utf uth uto utt utu uua uut uuu