b-u bbb bbc bbe bbk bbt bbu bcb bcc bce bck bct bcu be- beb bec bee bek bet beu bkb bkc bke bkk bkt btb btc bte btk btt btu bub buc bue buk but buu c-- cbb cbc cbe cbk cbt cbu ccb ccc cce cck cct ccu ce- ceb cec cee cek cet ceu ckb ckc ckt ctb ctc cte ctk ctt ctu cub cuc cue cuk cut cuu ebb ebc ebe ebk ebt ebu ec- ecb ecc ece eck ect ecu eeb eec eee eek eet ekb ekc eke ekt eku etb etc ete etk ett etu eu- eub euc eue eut k-t kbb kbc kbe kbk kbu kcb kcc kce kck kct kcu ke- keb kec kee kek ket kkb kkc kke kkk kkt kku ktb ktc kte ktk ktt ktu kub kuc kue kuk kut kuu tbb tbc tbe tbk tbt tbu tcb tcc tce tck tct tcu te- teb tec tee tek tet teu tkb tkc tke tkk tkt ttb ttc tte ttk ttt ttu tub tuc tue tuk tut tuu ubb ubc ube ubk ubt ubu ucb ucc uce uck uct ucu ueb uec uee uet ukb ukc uke ukk uku utb utc ute utk utt utu uuc uue uut uuu