-er bbb bbe bbf bbg bbi bbl bbr bbt be- beb bee bef beg bei bel ber bet bfb bfe bff bfg bfi bfl bfr bft bgb bge bgf bgg bgi bgl bgr bgt bi- bib bie bif big bii bil bir bit blb ble blf blg bli bll blr blt brb bre brf brg bri brl brr brt btb bte btf btg bti btl btr btt ebb ebe ebf ebg ebi ebl ebr ebt eeb eee eef eeg eel eer eet ef- efb efe eff efg efi efl efr eft egb ege egf egg egi egl egr egt eib eie eif eig eii eil eir eit elb ele elf elg eli ell elr elt erb ere erf erg eri erl err ert etb ete etf etg eti etl etr ett fbb fbe fbf fbg fbi fbl fbr fbt feb fee fef feg fei fel fer fet ffe fff ffg ffi ffl ffr fft fgb fge fgf fgg fgi fgl fgr fgt fib fie fif fig fii fil fir fit flb fle flf flg fli fll flr flt frb fre frf frg fri frl frr frt ftb fte ftf ftg fti ftl ftr ftt gbe gbf gbg gbi gbl gbr gbt ge- geb gee gef geg gei gel ger get gfb gfe gff gfi gfl gfr gft ggb ggg ggi ggr ggt gib gie gif gig gii gil gir git glb gle glf glg gli gll glr glt grb gre grf grg gri grl grr grt gtb gte gtf gtg gti gtl gtr gtt i-f ibb ibe ibf ibg ibi ibl ibr ibt ie- iee ief ieg iei iel ier iet ifb ife iff ifg ifi ifl ifr ift igb ige igf igg igi igl igr igt iib iie iif iii iil iir iit il- ilb ile ilf ilg ili ill ilr ilt ir- irb ire irf irg iri irl irr irt itb ite itf itg iti itl itt lbb lbe lbf lbg lbi lbl lbr lbt leb lee lef leg lei lel ler let lfb lfe lff lfg lfi lfl lfr lft lgb lge lgf lgg lgi lgl lgr lgt lib lie lif lig lii lil lir lit llb lle llf llg lli lll llr llt lrb lrf lrg lri lrr lrt ltb lte ltf ltg lti ltl ltr ltt rbb rbe rbf rbg rbi rbl rbr rbt re- reb ree ref reg rei rel rer ret rfb rfe rff rfg rfi rfl rfr rft rgb rge rgf rgg rgi rgr rgt rib rie rif rig rii ril rir rit rle rlf rlg rli rll rlr rlt rrb rrf rrg rri rrl rrr rrt rtb rte rtf rtg rti rtl rtr rtt tbb tbe tbf tbg tbi tbl tbr tbt te- teb tee tef teg tei tel ter tet tfb tfe tff tfg tfi tfl tfr tft tgb tge tgf tgg tgi tgl tgr tgt tib tie tif tig tii til tir tit tle tlf tlg tli tll tlr tlt trb tre trf trg tri trl trr trt ttb tte ttf ttg tti ttl ttr ttt