-er b-u bbb bbd bbe bbg bbi bbr bbu bdb bdd bde bdg bdi bdr bdu be- beb bed bee beg bei ber beu bgb bgd bge bgg bgi bgr bgu bi- bib bid bie big bii bir biu brb brd bre brg bri brr bru bub bud bue bug bui bur buu dbb dbd dbe dbg dbi dbr dbu ddb ddd dde ddg ddi ddr ddu de- deb ded dee deg dei der deu dgd dge dgg dgi dgr dgu di- dib did die dig dii dir diu drb drd dre drg dri drr dru dub dud due dug dui dur ebb ebd ebe ebg ebi ebr ebu ed- edb edd ede edg edi edr edu eeb eed eee eeg eer egb egd ege egg egi egr egu eib eid eie eig eii eir eiu erb erd ere erg eri err eru eu- eub eud eue eug eui eur g-d gbd gbe gbg gbi gbr gbu gdb gdd gde gdi gdr gdu ge- geb ged gee geg gei ger geu ggb ggd ggg ggi ggr ggu gib gid gie gig gii gir giu grb grd gre grg gri grr gru gu- gub gud gue gug gui gur guu i-d ibb ibd ibe ibg ibi ibr ibu idb idd ide idg idi idr idu ie- ied iee ieg iei ier igb igd ige igg igi igr igu iib iid iie iii iir iiu ir- irb ird ire irg iri irr iru iu- iub iud iue iug iui iur rbb rbd rbe rbg rbi rbr rbu rdb rdd rde rdg rdi rdr rdu re- reb red ree reg rei rer reu rgb rgd rge rgg rgi rgr rib rid rie rig rii rir rrb rrd rrg rri rrr rru rub rud rue rug rui rur ruu ubb ube ubg ubi ubr ubu udb udd ude udg udi udr udu ueb ued uee ueg uei uer ugb uge ugg ugi ugr ugu uib uid uie uig uii uir uiu ur- urb urd ure urg uri urr uru uue uug uur uuu