b-u bbb bbc bbe bbg bbk bbl bbn bbu bcb bcc bce bcg bck bcl bcn bcu be- beb bec bee beg bek bel ben beu bgb bgc bge bgg bgk bgl bgn bgu bkb bkc bke bkg bkk bkl bkn blb blc ble blg blk bll bln blu bnb bnc bne bng bnk bnl bnn bnu bub buc bue bug buk bul bun buu c-- cbb cbc cbe cbg cbk cbl cbn cbu ccb ccc cce ccg cck ccl ccn ccu ce- ceb cec cee ceg cek cel cen ceu cgb cgc cge cgg cgl cgn cgu ckb ckc cl- clb clc cle clg clk cll cln clu cn- cnb cnc cne cng cnl cnn cnu cub cuc cue cug cuk cul cun cuu ebb ebc ebe ebg ebk ebl ebn ebu ec- ecb ecc ece ecg eck ecl ecn ecu eeb eec eee eeg eek eel een egb egc ege egg egl egn egu ekb ekc eke ekg ekl eku elb elc ele elg elk ell eln elu en- enb enc ene eng enk enl enn enu eu- eub euc eue eug eul eun gbc gbe gbg gbk gbl gbn gbu gcb gcc gce gcg gck gcl gcn gcu ge- geb gec gee geg gek gel gen geu ggb ggc ggg ggn ggu gkb gkn glb glc gle glg glk gll gln glu gnb gnc gne gnl gnn gnu gu- gub guc gue gug guk gul gun guu kbb kbc kbe kbk kbl kbn kbu kcb kcc kce kcg kck kcl kcn kcu ke- keb kec kee keg kek kel ken kgb kgc kgl kgu kkb kkc kke kkk kkl kkn kku kl- klb klc klg klu kn- knc kne kng knk knl knn knu kub kuc kue kug kuk kul kun kuu lbb lbc lbe lbg lbk lbl lbu lcb lcc lce lcg lck lcl lcn lcu leb lec lee leg lek lel len leu lgb lgc lge lgg lgk lgl lgn lgu lkb lkg lkl llb llc lle llg llk lll lln llu lnb lnc lne lng lnk lnl lnn lnu lub luc lue lug luk lul lun luu nbb nbc nbe nbg nbk nbl nbn nbu ncb ncc nce ncg nck ncl ncn ncu ne- neb nec nee neg nek nel nen neu ngb ngc nge ngg ngk ngl ngn ngu nkc nke nkk nkn nku nlb nlc nle nlg nlk nll nln nlu nnb nnc nne nng nnk nnl nnn nnu nub nuc nue nug nuk nul nun nuu ubb ubc ube ubg ubk ubl ubn ubu ucb ucc uce ucg uck ucl ucn ucu ueb uec uee ueg uel uen ugb ugc uge ugg ugk ugl ugn ugu ukb ukc uke ukk ukl ukn uku ulb ulc ule ulg ulk ull uln ulu un- unb unc une ung unk unl unn unu uuc uue uug uun uuu