b-u bbb bbc bbd bbe bbk bbt bbu bcb bcc bcd bce bck bct bcu bdb bdc bdd bde bdk bdt bdu be- beb bec bed bee bek bet beu bkb bkc bke bkk bkt btb btc btd bte btk btt btu bub buc bud bue buk but buu c-- cbb cbc cbd cbe cbk cbt cbu ccb ccc ccd cce cck cct ccu cdb cdc cdd cde cdk cdt cdu ce- ceb cec ced cee cek cet ceu ckb ckc ckd ckt ctb ctc ctd cte ctk ctt ctu cub cuc cud cue cuk cut cuu dbb dbc dbd dbe dbk dbt dbu dcb dcc dcd dce dck dct dcu ddb ddc ddd dde ddk ddt ddu de- deb dec ded dee dek det deu dkb dkc dke dkk dkt dku dtb dtc dtd dte dtk dtt dtu dub duc dud due duk dut ebb ebc ebd ebe ebk ebt ebu ec- ecb ecc ecd ece eck ect ecu ed- edb edc edd ede edk edt edu eeb eec eed eee eek eet ekb ekc ekd eke ekt eku etb etc etd ete etk ett etu eu- eub euc eud eue eut k-t kbb kbc kbd kbe kbk kbu kcb kcc kcd kce kck kct kcu kdb kdc kde kdk kdt kdu ke- keb kec ked kee kek ket kkb kkc kke kkk kkt kku ktb ktc kte ktk ktt ktu kub kuc kud kue kuk kut kuu tbb tbc tbd tbe tbk tbt tbu tcb tcc tcd tce tck tct tcu tdb tdc tdd tde tdk tdt tdu te- teb tec ted tee tek tet teu tkb tkc tke tkk tkt ttb ttc ttd tte ttk ttt ttu tub tuc tud tue tuk tut tuu ubb ubc ube ubk ubt ubu ucb ucc ucd uce uck uct ucu udb udc udd ude udk udt udu ueb uec ued uee uet ukb ukc uke ukk uku utb utc utd ute utk utt utu uuc uue uut uuu