-er b-u bbb bbe bbg bbk bbn bbr bbt bbu be- beb bee beg bek ben ber bet beu bgb bge bgg bgk bgn bgr bgt bgu bkb bke bkg bkk bkn bkr bkt bnb bne bng bnk bnn bnr bnt bnu brb bre brg brk brn brr brt bru btb bte btg btk btn btr btt btu bub bue bug buk bun bur but buu ebb ebe ebg ebk ebn ebr ebt ebu eeb eee eeg eek een eer eet egb ege egg egn egr egt egu ekb eke ekg ekr ekt eku en- enb ene eng enk enn enr ent enu erb ere erg erk ern err ert eru etb ete etg etk etn etr ett etu eu- eub eue eug eun eur eut gbe gbg gbk gbn gbr gbt gbu ge- geb gee geg gek gen ger get geu ggb ggg ggn ggr ggt ggu gkb gkn gkt gnb gne gnn gnr gnt gnu grb gre grg grk grn grr grt gru gtb gte gtg gtk gtn gtr gtt gtu gu- gub gue gug guk gun gur gut guu k-t kbb kbe kbk kbn kbr kbu ke- keb kee keg kek ken ker ket kgb kgu kkb kke kkk kkn kkr kkt kku kn- kne kng knk knn knr knt knu krg krk krn krr krt kru ktb kte ktg ktk ktn ktr ktt ktu kub kue kug kuk kun kur kut kuu nbb nbe nbg nbk nbn nbr nbt nbu ne- neb nee neg nek nen ner net neu ngb nge ngg ngk ngn ngt ngu nke nkk nkn nkr nkt nku nnb nne nng nnk nnn nnt nnu nrb nre nrg nrk nrn nrr nrt nru ntb nte ntg ntk ntn ntr ntt ntu nub nue nug nuk nun nur nut nuu rbb rbe rbg rbk rbn rbr rbt rbu re- reb ree reg rek ren rer ret reu rgb rge rgg rgk rgn rgr rgt rkb rke rkg rkk rkt rku rnb rng rnn rnr rnt rnu rrb rrg rrk rrn rrr rrt rru rtb rte rtg rtk rtn rtr rtt rtu rub rue rug ruk run rur rut ruu tbb tbe tbg tbk tbn tbr tbt tbu te- teb tee teg tek ten ter tet teu tgb tge tgg tgk tgn tgr tgt tgu tkb tke tkg tkk tkr tkt tnb tne tng tnk tnn tnr tnt trb tre trg trk trn trr trt tru ttb tte ttg ttk ttn ttr ttt ttu tub tue tug tuk tun tur tut tuu ubb ube ubg ubk ubn ubr ubt ubu ueb uee ueg uen uer uet ugb uge ugg ugk ugn ugr ugt ugu ukb uke ukk ukn ukr uku un- unb une ung unk unn unr unt unu ur- urb ure urg urk urn urr urt uru utb ute utk utn utr utt utu uue uug uun uur uut uuu