-er b-u bbb bbd bbe bbg bbi bbk bbr bbu bdb bdd bde bdg bdi bdk bdr bdu be- beb bed bee beg bei bek ber beu bgb bgd bge bgg bgi bgk bgr bgu bi- bib bid bie big bii bik bir biu bkb bke bkg bkk bkr brb brd bre brg bri brk brr bru bub bud bue bug bui buk bur buu dbb dbd dbe dbg dbi dbk dbr dbu ddb ddd dde ddg ddi ddk ddr ddu de- deb ded dee deg dei dek der deu dgd dge dgg dgi dgk dgr dgu di- dib did die dig dii dik dir diu dkb dke dkg dki dkk dkr dku drb drd dre drg dri drk drr dru dub dud due dug dui duk dur ebb ebd ebe ebg ebi ebk ebr ebu ed- edb edd ede edg edi edk edr edu eeb eed eee eeg eek eer egb egd ege egg egi egr egu eib eid eie eig eii eik eir eiu ekb ekd eke ekg eki ekr eku erb erd ere erg eri erk err eru eu- eub eud eue eug eui eur g-d gbd gbe gbg gbi gbk gbr gbu gdb gdd gde gdi gdk gdr gdu ge- geb ged gee geg gei gek ger geu ggb ggd ggg ggi ggr ggu gib gid gie gig gii gik gir giu gkb gkd grb grd gre grg gri grk grr gru gu- gub gud gue gug gui guk gur guu i-d ibb ibd ibe ibg ibi ibk ibr ibu idb idd ide idg idi idk idr idu ie- ied iee ieg iei iek ier igb igd ige igg igi igk igr igu iib iid iie iii iir iiu ikb ike iki ikk ikr iku ir- irb ird ire irg iri irk irr iru iu- iub iud iue iug iui iur kbb kbd kbe kbi kbk kbr kbu kdb kde kdg kdk kdr kdu ke- keb ked kee keg kei kek ker kgb kgd kgi kgu kib kid kie kig kii kik kir kiu kkb kke kki kkk kkr kku krd krg kri krk krr kru kub kud kue kug kui kuk kur kuu rbb rbd rbe rbg rbi rbk rbr rbu rdb rdd rde rdg rdi rdr rdu re- reb red ree reg rei rek rer reu rgb rgd rge rgg rgi rgk rgr rib rid rie rig rii rik rir rkb rke rkg rkk rku rrb rrd rrg rri rrk rrr rru rub rud rue rug rui ruk rur ruu ubb ube ubg ubi ubk ubr ubu udb udd ude udg udi udk udr udu ueb ued uee ueg uei uer ugb uge ugg ugi ugk ugr ugu uib uid uie uig uii uir uiu ukb uke uki ukk ukr uku ur- urb urd ure urg uri urk urr uru uue uug uur uuu