-th a-a a-b a-c a-t aaa aab aac aah aak aat aau ab- aba abb abc abh abk abt abu ac- aca acb acc ach ack act acu aha ahb ahc ahh ahk aht ahu aka akb akc akh akk aku at- ata atb atc ath att atu au- aua aub auc auh auk aut b-u baa bab bac bah bak bat bau bba bbb bbc bbh bbk bbt bbu bca bcb bcc bch bck bct bcu bha bhb bhc bhh bhk bht bhu bka bkb bkc bkk bkt bta btb btc bth btk btt btu bua bub buc buh buk but buu c-- caa cab cac cah cak cat cau cba cbb cbc cbh cbk cbt cbu cca ccb ccc cch cck cct ccu ch- cha chb chc chh chk cht chu cka ckb ckc ckh ckt cta ctb ctc cth ctk ctt ctu cua cub cuc cuh cuk cut cuu haa hab hac hah hak hat hau hba hbb hbc hbh hbk hbt hbu hca hcb hcc hch hck hct hha hhb hhc hhh hhk hht hhu hka hkb hkh hkk hkt hku hta htb htc hth htk htt hua hub huc huh huk hut huu k-t ka- kaa kab kac kah kak kat kau kba kbb kbc kbh kbk kbu kca kcb kcc kch kck kct kcu kha khh khk khu kkb kkc kkh kkk kkt kku kta ktb ktc kth ktk ktt ktu kub kuc kuh kuk kut kuu taa tab tac tah tak tat tau tba tbb tbc tbh tbk tbt tbu tca tcb tcc tch tck tct tcu th- tha thb thc thh thk tht thu tka tkb tkc tkk tkt tta ttb ttc tth ttk ttt ttu tua tub tuc tuh tuk tut tuu ua- uaa uab uac uah uak uat uau uba ubb ubc ubh ubk ubt ubu uca ucb ucc uch uck uct ucu uha uhb uhc uhh uht uhu uka ukb ukc ukk uku uta utb utc uth utk utt utu uua uuc uut uuu