bbb bbf bbg bbi bbo bbr bbt bfb bff bfg bfi bfo bfr bft bgb bgf bgg bgi bgo bgr bgt bi- bib bif big bii bio bir bit bob bof bog boi boo bor bot brb brf brg bri bro brr brt btb btf btg bti bto btr btt fbb fbf fbg fbi fbo fbr fbt fff ffg ffi ffo ffr fft fgb fgf fgg fgi fgr fgt fib fif fig fii fir fit fob fof fog foi foo for fot frb frf frg fri fro frr frt ftb ftf ftg fti fto ftr ftt gbf gbg gbi gbo gbr gbt gfb gff gfi gfo gfr gft ggb ggg ggi ggo ggr ggt gib gif gig gii gio gir git gob gof gog goi goo gor got grb grf grg gri gro grr grt gtb gtf gtg gti gto gtr gtt i-f ibb ibf ibg ibi ibo ibr ibt ifb iff ifg ifi ifo ifr ift igb igf igg igi igo igr igt iib iif iii iio iir iit io- iob iof iog ioi ioo ior iot ir- irb irf irg iri iro irr irt itb itf itg iti ito itt o-i ob- obb obf obg obi obo obr obt of- ofb off ofg ofi ofo ofr oft ogf ogg ogi ogo ogt oib oif oii oio oir oit oo- oob oof oog ooi ooo oor oot or- orb orf org ori oro orr ort ot- otb otf otg oti oto otr ott rbb rbf rbg rbi rbo rbr rbt rfb rff rfg rfi rfo rfr rft rgb rgf rgg rgi rgo rgr rgt rib rif rig rii rio rir rit rob rof rog roi roo ror rot rrb rrf rrg rri rrr rrt rtb rtf rtg rti rto rtr rtt tbb tbf tbg tbi tbo tbr tbt tfb tff tfg tfi tfo tfr tft tgb tgf tgg tgi tgo tgr tgt tib tif tig tii tio tir tit to- tob tof tog toi too tor tot trb trf trg tri tro trr trt ttb ttf ttg tti tto ttr ttt