-th a-a a-b a-c a-t aaa aab aac aae aah aak aat aau ab- aba abb abc abe abh abk abt abu ac- aca acb acc ace ach ack act acu aea aeb aec aee aeh aek aet aeu aha ahb ahc ahe ahh ahk aht ahu aka akb akc ake akh akk aku at- ata atb atc ate ath att atu au- aua aub auc aue auh auk aut b-u baa bab bac bae bah bak bat bau bba bbb bbc bbe bbh bbk bbt bbu bca bcb bcc bce bch bck bct bcu be- bea beb bec bee beh bek bet beu bha bhb bhc bhe bhh bhk bht bhu bka bkb bkc bke bkk bkt bta btb btc bte bth btk btt btu bua bub buc bue buh buk but buu c-- caa cab cac cae cah cak cat cau cba cbb cbc cbe cbh cbk cbt cbu cca ccb ccc cce cch cck cct ccu ce- cea ceb cec cee ceh cek cet ceu ch- cha chb chc che chh chk cht chu cka ckb ckc ckh ckt cta ctb ctc cte cth ctk ctt ctu cua cub cuc cue cuh cuk cut cuu eaa eab eac eae eah eak eat eau eba ebb ebc ebe ebh ebk ebt ebu ec- eca ecb ecc ece ech eck ect ecu eea eeb eec eee eek eet eha ehb ehc ehe ehh eht ehu eka ekb ekc eke ekh ekt eku eta etb etc ete eth etk ett etu eu- eua eub euc eue eut haa hab hac hae hah hak hat hau hba hbb hbc hbe hbh hbk hbt hbu hca hcb hcc hce hch hck hct he- hea heb hec hee heh hek het heu hha hhb hhc hhe hhh hhk hht hhu hka hkb hkh hkk hkt hku hta htb htc hte hth htk htt hua hub huc hue huh huk hut huu k-t ka- kaa kab kac kae kah kak kat kau kba kbb kbc kbe kbh kbk kbu kca kcb kcc kce kch kck kct kcu ke- kea keb kec kee keh kek ket kha khe khh khk khu kkb kkc kke kkh kkk kkt kku kta ktb ktc kte kth ktk ktt ktu kub kuc kue kuh kuk kut kuu taa tab tac tae tah tak tat tau tba tbb tbc tbe tbh tbk tbt tbu tca tcb tcc tce tch tck tct tcu te- tea teb tec tee teh tek tet teu th- tha thb thc the thh thk tht thu tka tkb tkc tke tkk tkt tta ttb ttc tte tth ttk ttt ttu tua tub tuc tue tuh tuk tut tuu ua- uaa uab uac uae uah uak uat uau uba ubb ubc ube ubh ubk ubt ubu uca ucb ucc uce uch uck uct ucu uea ueb uec uee ueh uet uha uhb uhc uhe uhh uht uhu uka ukb ukc uke ukk uku uta utb utc ute uth utk utt utu uua uuc uue uut uuu