-er b-u bbb bbe bbg bbk bbm bbr bbu be- beb bee beg bek bem ber beu bgb bge bgg bgk bgm bgr bgu bjg bjj bjk bjm bjr bju bkb bke bkg bkk bkm bkr bmb bme bmg bmj bmk bmm bmr bmu brb bre brg brj brk brm brr bru bub bue bug buj buk bum bur buu ebb ebe ebg ebj ebk ebm ebr ebu eeb eee eeg eek eem eer egb ege egg egm egr egu eju ekb eke ekg ekr eku em- emb eme emg emk emm emr emu erb ere erg erk erm err eru eu- eub eue eug euj eur gbe gbg gbj gbk gbm gbr gbu ge- geb gee geg gek gem ger geu ggb ggg ggj ggm ggr ggu gje gjg gjr gkb gkm gmb gme gmg gmj gmm gmr grb gre grg grj grk grm grr gru gu- gub gue gug guj guk gum gur guu jbg jbj jbk jbm jbr jbu jeb jee jeg jej jek jem jer jeu jgb jge jgr jgu jjb jjg jjj jjk jjr jju jkb jkk jkm jkr jku jmb jme jmj jmm jmr jmu jrb jrg jrk jrm jrr jub jue jug juk jum jur kbb kbe kbk kbm kbr kbu ke- keb kee keg kek kem ker kgb kgm kgu kjb kje kjr kju kkb kke kkk kkm kkr kku kmb kme kmg kmj kmk kmm kmu krg krk krr kru kub kue kug kuj kuk kum kur kuu m-r mbb mbe mbg mbj mbk mbm mbr mbu meb mee meg mej mek mem mer meu mgb mge mgj mgk mgm mgr mgu mjb mje mjj mjk mjm mjr mkb mke mkg mkk mkm mkr mku mmb mme mmg mmj mmk mmm mmr mmu mrb mre mrg mrj mrk mrm mrr mru mub mue mug muj muk mum mur muu rbb rbe rbg rbk rbm rbr rbu re- reb ree reg rek rem rer reu rgb rge rgg rgk rgr rjg rjk rjm rjr rkb rke rkg rkk rkm rku rmb rme rmg rmm rmr rrb rrg rrk rrm rrr rru rub rue rug ruk rum rur ruu ubb ube ubg ubk ubr ubu ueb uee ueg uem uer ugb uge ugg ugk ugm ugr ugu ukb uke ukk ukr uku um- umb ume umg umm umr umu ur- urb ure urg urk urm urr uru uue uug uum uur uuu