-th a-a a-b a-c a-t aaa aab aac aah aak aao aat aau ab- aba abb abc abh abk abo abt abu ac- aca acb acc ach ack aco act acu aha ahb ahc ahh ahk aho aht ahu aka akb akc akh akk ako aku aoa aob aoc aoh aok aoo aot aou at- ata atb atc ath ato att atu au- aua aub auc auh auk auo aut b-u baa bab bac bah bak bao bat bau bba bbb bbc bbh bbk bbo bbt bbu bca bcb bcc bch bck bco bct bcu bha bhb bhc bhh bhk bho bht bhu bka bkb bkc bkk bko bkt boa bob boc boh bok boo bot bou bta btb btc bth btk bto btt btu bua bub buc buh buk buo but buu c-- caa cab cac cah cak cao cat cau cba cbb cbc cbh cbk cbo cbt cbu cca ccb ccc cch cck cco cct ccu ch- cha chb chc chh chk cho cht chu cka ckb ckc ckh cko ckt co- coa cob coc coh cok coo cot cou cta ctb ctc cth ctk cto ctt ctu cua cub cuc cuh cuk cuo cut cuu haa hab hac hah hak hao hat hau hba hbb hbc hbh hbk hbo hbt hbu hca hcb hcc hch hck hco hct hha hhb hhc hhh hhk hho hht hhu hka hkb hkh hkk hko hkt hku hoa hob hoc hoh hok hoo hot hou hta htb htc hth htk hto htt hua hub huc huh huk huo hut huu k-t ka- kaa kab kac kah kak kao kat kau kba kbb kbc kbh kbk kbo kbu kca kcb kcc kch kck kct kcu kha khh khk kho khu kkb kkc kkh kkk kkt kku koa kob koc koh kok koo kot kou kta ktb ktc kth ktk kto ktt ktu kub kuc kuh kuk kut kuu oaa oab oac oah oak oao oat oau ob- oba obb obc obh obk obo obt obu oc- oca ocb occ och ock oco oct ocu oha ohc ohh oho oht ohu oka okb okc okk oko oku oo- ooa oob ooc ooh ook ooo oot ot- ota otb otc oth otk oto ott otu ou- oua ouc ouh ouk ouo out taa tab tac tah tak tao tat tau tba tbb tbc tbh tbk tbo tbt tbu tca tcb tcc tch tck tco tct tcu th- tha thb thc thh thk tho tht thu tka tkb tkc tkk tko tkt to- toa tob toc toh tok too tot tou tta ttb ttc tth ttk tto ttt ttu tua tub tuc tuh tuk tuo tut tuu ua- uaa uab uac uah uak uao uat uau uba ubb ubc ubh ubk ubo ubt ubu uca ucb ucc uch uck uco uct ucu uha uhb uhc uhh uho uht uhu uka ukb ukc ukk uku uoa uob uoc uok uoo uot uta utb utc uth utk uto utt utu uua uuc uut uuu