-th a-a a-b a-c a-t aaa aab aac aae aah aak aat ab- aba abb abc abe abh abk abt ac- aca acb acc ace ach ack act aea aeb aec aee aeh aek aet aha ahb ahc ahe ahh ahk aht aka akb akc ake akh akk at- ata atb atc ate ath att baa bab bac bae bah bak bat bba bbb bbc bbe bbh bbk bbt bca bcb bcc bce bch bck bct be- bea beb bec bee beh bek bet bha bhb bhc bhe bhh bhk bht bka bkb bkc bke bkk bkt bta btb btc bte bth btk btt c-- caa cab cac cae cah cak cat cba cbb cbc cbe cbh cbk cbt cca ccb ccc cce cch cck cct ce- cea ceb cec cee ceh cek cet ch- cha chb chc che chh chk cht cka ckb ckc ckh ckt cta ctb ctc cte cth ctk ctt eaa eab eac eae eah eak eat eba ebb ebc ebe ebh ebk ebt ec- eca ecb ecc ece ech eck ect eea eeb eec eee eek eet eha ehb ehc ehe ehh eht eka ekb ekc eke ekh ekt eta etb etc ete eth etk ett haa hab hac hae hah hak hat hba hbb hbc hbe hbh hbk hbt hca hcb hcc hce hch hck hct he- hea heb hec hee heh hek het hha hhb hhc hhe hhh hhk hht hka hkb hkh hkk hkt hta htb htc hte hth htk htt k-t ka- kaa kab kac kae kah kak kat kba kbb kbc kbe kbh kbk kca kcb kcc kce kch kck kct ke- kea keb kec kee keh kek ket kha khe khh khk kkb kkc kke kkh kkk kkt kta ktb ktc kte kth ktk ktt taa tab tac tae tah tak tat tba tbb tbc tbe tbh tbk tbt tca tcb tcc tce tch tck tct te- tea teb tec tee teh tek tet th- tha thb thc the thh thk tht tka tkb tkc tke tkk tkt tta ttb ttc tte tth ttk ttt