b-u bbb bbc bbe bbf bbk bbl bbt bbu bcb bcc bce bcf bck bcl bct bcu be- beb bec bee bef bek bel bet beu bfb bfc bfe bff bfl bft bfu bkb bkc bke bkf bkk bkl bkt blb blc ble blf blk bll blt blu btb btc bte btf btk btl btt btu bub buc bue buf buk bul but buu c-- cbb cbc cbe cbf cbk cbl cbt cbu ccb ccc cce ccf cck ccl cct ccu ce- ceb cec cee cef cek cel cet ceu cfb cfc cfe cff cfk cfl cft cfu ckb ckc ckt cl- clb clc cle clf clk cll clt clu ctb ctc cte ctf ctk ctl ctt ctu cub cuc cue cuf cuk cul cut cuu ebb ebc ebe ebf ebk ebl ebt ebu ec- ecb ecc ece ecf eck ecl ect ecu eeb eec eee eef eek eel eet ef- efb efc efe eff efl eft ekb ekc eke ekf ekl ekt eku elb elc ele elf elk ell elt elu etb etc ete etf etk etl ett etu eu- eub euc eue euf eul eut fbb fbc fbe fbf fbk fbl fbt fbu fcb fcc fce fcf fck fcl fct fcu feb fec fee fef fek fel fet feu ffc ffe fff ffk ffl fft ffu fkb fkc fkf fkk fkl fkt flb flc fle flf fll flt flu ftb ftc fte ftf ftk ftl ftt ftu fub fue fuf fuk ful fut fuu k-t kbb kbc kbe kbf kbk kbl kbu kcb kcc kce kck kcl kct kcu ke- keb kec kee kef kek kel ket kfc kff kfu kkb kkc kke kkk kkl kkt kku kl- klb klc klf klt klu ktb ktc kte ktf ktk ktl ktt ktu kub kuc kue kuk kul kut kuu lbb lbc lbe lbf lbk lbl lbt lbu lcb lcc lce lcf lck lcl lct lcu leb lec lee lef lek lel let leu lfb lfc lfe lff lfk lfl lft lfu lkb lkl lkt llb llc lle llf llk lll llt llu ltb ltc lte ltf ltk ltl ltt ltu lub luc lue luf luk lul lut luu tbb tbc tbe tbf tbk tbl tbt tbu tcb tcc tce tcf tck tcl tct tcu te- teb tec tee tef tek tel tet teu tfb tfc tfe tff tfk tfl tft tfu tkb tkc tke tkk tkl tkt tlc tle tlf tlk tll tlt tlu ttb ttc tte ttf ttk ttl ttt ttu tub tuc tue tuf tuk tul tut tuu ubb ubc ube ubf ubk ubl ubt ubu ucb ucc uce ucf uck ucl uct ucu ueb uec uee uef uel uet ufc ufe uff ufl uft ufu ukb ukc uke ukf ukk ukl uku ulb ulc ule ulf ulk ull ult ulu utb utc ute utf utk utl utt utu uuc uue uut uuu