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