-th a-a a-b a-c a-t aaa aab aac aad aah aak aao aat aau ab- aba abb abc abd abh abk abo abt abu ac- aca acb acc acd ach ack aco act acu ad- ada adb adc add adh adk ado adt adu aha ahb ahc ahd ahh ahk aho aht ahu aka akb akc akd akh akk ako aku aoa aob aoc aod aoh aok aoo aot aou at- ata atb atc atd ath ato att atu au- aua aub auc aud auh auk auo aut b-u baa bab bac bad bah bak bao bat bau bba bbb bbc bbd bbh bbk bbo bbt bbu bca bcb bcc bcd bch bck bco bct bcu bda bdb bdc bdd bdh bdk bdo bdt bdu bha bhb bhc bhd bhh bhk bho bht bhu bka bkb bkc bkk bko bkt boa bob boc bod boh bok boo bot bou bta btb btc btd bth btk bto btt btu bua bub buc bud buh buk buo but buu c-- caa cab cac cad cah cak cao cat cau cba cbb cbc cbd cbh cbk cbo cbt cbu cca ccb ccc ccd cch cck cco cct ccu cda cdb cdc cdd cdh cdk cdo cdt cdu ch- cha chb chc chd chh chk cho cht chu cka ckb ckc ckd ckh cko ckt co- coa cob coc cod coh cok coo cot cou cta ctb ctc ctd cth ctk cto ctt ctu cua cub cuc cud cuh cuk cuo cut cuu daa dab dac dad dah dak dao dat dau dba dbb dbc dbd dbh dbk dbo dbt dbu dca dcb dcc dcd dck dco dct dcu dda ddb ddc ddd ddh ddk ddo ddt ddu dh- dha dhb dhc dhd dhh dhk dho dht dhu dka dkb dkc dkk dko dkt dku doa dob doc dod doh dok doo dot dou dta dtb dtc dtd dth dtk dto dtt dtu dua dub duc dud duh duk duo dut haa hab hac had hah hak hao hat hau hba hbb hbc hbd hbh hbk hbo hbt hbu hca hcb hcc hcd hch hck hco hct hda hdb hdc hdd hdh hdk hdo hdt hdu hha hhb hhc hhd hhh hhk hho hht hhu hka hkb hkd hkh hkk hko hkt hku hoa hob hoc hod hoh hok hoo hot hou hta htb htc htd hth htk hto htt hua hub huc hud huh huk huo hut huu k-t ka- kaa kab kac kad kah kak kao kat kau kba kbb kbc kbd kbh kbk kbo kbu kca kcb kcc kcd kch kck kct kcu kda kdb kdc kdh kdk kdo kdt kdu kha khh khk kho khu kkb kkc kkh kkk kkt kku koa kob koc kod koh kok koo kot kou kta ktb ktc kth ktk kto ktt ktu kub kuc kud kuh kuk kut kuu oaa oab oac oad oah oak oao oat oau ob- oba obb obc obd obh obk obo obt obu oc- oca ocb occ ocd och ock oco oct ocu oda odb odc odd odh odo odt odu oha ohc ohd ohh oho oht ohu oka okb okc okd okk oko oku oo- ooa oob ooc ood ooh ook ooo oot ot- ota otb otc otd oth otk oto ott otu ou- oua ouc oud ouh ouk ouo out taa tab tac tad tah tak tao tat tau tba tbb tbc tbd tbh tbk tbo tbt tbu tca tcb tcc tcd tch tck tco tct tcu tda tdb tdc tdd tdh tdk tdo tdt tdu th- tha thb thc thd thh thk tho tht thu tka tkb tkc tkk tko tkt to- toa tob toc tod toh tok too tot tou tta ttb ttc ttd tth ttk tto ttt ttu tua tub tuc tud tuh tuk tuo tut tuu ua- uaa uab uac uad uah uak uao uat uau uba ubb ubc ubh ubk ubo ubt ubu uca ucb ucc ucd uch uck uco uct ucu uda udb udc udd udk udo udt udu uha uhb uhc uhd uhh uho uht uhu uka ukb ukc ukk uku uoa uob uoc uod uok uoo uot uta utb utc utd uth utk uto utt utu uua uuc uut uuu