-er bbb bbe bbf bbg bbi bbo bbr bbt be- beb bee bef beg bei beo ber bet bfb bfe bff bfg bfi bfo bfr bft bgb bge bgf bgg bgi bgo bgr bgt bi- bib bie bif big bii bio bir bit bob boe bof bog boi boo bor bot brb bre brf brg bri bro brr brt btb bte btf btg bti bto btr btt ebb ebe ebf ebg ebi ebo ebr ebt eeb eee eef eeg eeo eer eet ef- efb efe eff efg efi efo efr eft egb ege egf egg egi ego egr egt eib eie eif eig eii eio eir eit eo- eob eoe eof eog eoi eoo eor eot erb ere erf erg eri ero err ert etb ete etf etg eti eto etr ett fbb fbe fbf fbg fbi fbo fbr fbt feb fee fef feg fei feo fer fet ffe fff ffg ffi ffo ffr fft fgb fge fgf fgg fgi fgr fgt fib fie fif fig fii fir fit fob foe fof fog foi foo for fot frb fre frf frg fri fro frr frt ftb fte ftf ftg fti fto ftr ftt gbe gbf gbg gbi gbo gbr gbt ge- geb gee gef geg gei geo ger get gfb gfe gff gfi gfo gfr gft ggb ggg ggi ggo ggr ggt gib gie gif gig gii gio gir git gob goe gof gog goi goo gor got grb gre grf grg gri gro grr grt gtb gte gtf gtg gti gto gtr gtt i-f ibb ibe ibf ibg ibi ibo ibr ibt ie- iee ief ieg iei ier iet ifb ife iff ifg ifi ifo ifr ift igb ige igf igg igi igo igr igt iib iie iif iii iio iir iit io- iob ioe iof iog ioi ioo ior iot ir- irb ire irf irg iri iro irr irt itb ite itf itg iti ito itt o-i ob- obb obe obf obg obi obo obr obt oeb oee oef oeg oei oeo oer oet of- ofb ofe off ofg ofi ofo ofr oft oge ogf ogg ogi ogo ogt oib oie oif oii oio oir oit oo- oob oof oog ooi ooo oor oot or- orb ore orf org ori oro orr ort ot- otb ote otf otg oti oto otr ott rbb rbe rbf rbg rbi rbo rbr rbt re- reb ree ref reg rei reo rer ret rfb rfe rff rfg rfi rfo rfr rft rgb rge rgf rgg rgi rgo rgr rgt rib rie rif rig rii rio rir rit rob roe rof rog roi roo ror rot rrb rrf rrg rri rrr rrt rtb rte rtf rtg rti rto rtr rtt tbb tbe tbf tbg tbi tbo tbr tbt te- teb tee tef teg tei teo ter tet tfb tfe tff tfg tfi tfo tfr tft tgb tge tgf tgg tgi tgo tgr tgt tib tie tif tig tii tio tir tit to- tob toe tof tog toi too tor tot trb tre trf trg tri tro trr trt ttb tte ttf ttg tti tto ttr ttt