-er bbb bbd bbe bbg bbi bbr bbx bdb bdd bde bdg bdi bdr bdx be- beb bed bee beg bei ber bex bgb bgd bge bgg bgi bgr bgx bi- bib bid bie big bii bir bix brb brd bre brg bri brr brx bxb bxd bxi bxx dbb dbd dbe dbg dbi dbr dbx ddb ddd dde ddg ddi ddr ddx de- deb ded dee deg dei der dex dgd dge dgg dgi dgr di- dib did die dig dii dir dix drb drd dre drg dri drr drx dxd dxi dxr dxx ebb ebd ebe ebg ebi ebr ebx ed- edb edd ede edg edi edr edx eeb eed eee eeg eer eex egb egd ege egg egi egr egx eib eid eie eig eii eir eix erb erd ere erg eri err ex- exd exe exi exr exx g-d gbd gbe gbg gbi gbr gbx gdb gdd gde gdi gdr gdx ge- geb ged gee geg gei ger gex ggb ggd ggg ggi ggr gib gid gie gig gii gir grb grd gre grg gri grr grx i-d ibb ibd ibe ibg ibi ibr ibx idb idd ide idg idi idr idx ie- ied iee ieg iei ier iex igb igd ige igg igi igr iib iid iie iii iir iix ir- irb ird ire irg iri irr irx ixe ixi rbb rbd rbe rbg rbi rbr rbx rdb rdd rde rdg rdi rdr rdx re- reb red ree reg rei rer rex rgb rgd rge rgg rgi rgr rgx rib rid rie rig rii rir rix rrb rrd rrg rri rrr rxr xbe xbr xbx xdb xde xdi xdr xed xee xeg xer xex xge xgi xie xii xix xrd xrx xxi xxx