-th a-a a-b a-t aaa aab aad aah aak aao aat ab- aba abb abd abh abk abo abt ad- ada adb add adh adk ado adt aha ahb ahd ahh ahk aho aht aka akb akd akh akk ako aoa aob aod aoh aok aoo aot at- ata atb atd ath ato att baa bab bad bah bak bao bat bba bbb bbd bbh bbk bbo bbt bda bdb bdd bdh bdk bdo bdt bha bhb bhd bhh bhk bho bht bka bkb bkk bko bkt boa bob bod boh bok boo bot bta btb btd bth btk bto btt daa dab dad dah dak dao dat dba dbb dbd dbh dbk dbo dbt dda ddb ddd ddh ddk ddo ddt dh- dha dhb dhd dhh dhk dho dht dka dkb dkk dko dkt doa dob dod doh dok doo dot dta dtb dtd dth dtk dto dtt haa hab had hah hak hao hat hba hbb hbd hbh hbk hbo hbt hda hdb hdd hdh hdk hdo hdt hha hhb hhd hhh hhk hho hht hka hkb hkd hkh hkk hko hkt hoa hob hod hoh hok hoo hot hta htb htd hth htk hto htt k-t ka- kaa kab kad kah kak kao kat kba kbb kbd kbh kbk kbo kda kdb kdh kdk kdo kdt kha khh khk kho kkb kkh kkk kkt koa kob kod koh kok koo kot kta ktb kth ktk kto ktt oaa oab oad oah oak oao oat ob- oba obb obd obh obk obo obt oda odb odd odh odo odt oha ohd ohh oho oht oka okb okd okk oko oo- ooa oob ood ooh ook ooo oot ot- ota otb otd oth otk oto ott taa tab tad tah tak tao tat tba tbb tbd tbh tbk tbo tbt tda tdb tdd tdh tdk tdo tdt th- tha thb thd thh thk tho tht tka tkb tkk tko tkt to- toa tob tod toh tok too tot tta ttb ttd tth ttk tto ttt