-er bbb bbe bbf bbg bbi bbl bbr bbt be- beb bee bef beg bei bel ber bet bez bfb bfe bff bfg bfi bfl bfr bft bfz bgb bge bgf bgg bgi bgl bgr bgt bgz bi- bib bie bif big bii bil bir bit biz blb ble blf blg bli bll blr blt blz brb bre brf brg bri brl brr brt brz btb bte btf btg bti btl btr btt btz bze bzf bzr bzz 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 elz erb ere erf erg eri erl err ert erz etb ete etf etg eti etl etr ett etz eze ezf ezr ezz fbb fbe fbf fbg fbi fbl fbr fbt feb fee fef feg fei fel fer fet fez ffe fff ffg ffi ffl ffr fft ffz fgb fge fgf fgg fgi fgl fgr fgt fgz fib fie fif fig fii fil fir fit fiz flb fle flf flg fli fll flr flt frb fre frf frg fri frl frr frt ftb fte ftf ftg fti ftl ftr ftt ftz gbe gbf gbg gbi gbl gbr gbt gbz ge- geb gee gef geg gei gel ger get gez gfb gfe gff gfi gfl gfr gft gfz ggb ggg ggi ggr ggt ggz gib gie gif gig gii gil gir git giz glb gle glf glg gli gll glr glt glz grb gre grf grg gri grl grr grt gtb gte gtf gtg gti gtl gtr gtt gzr i-f ibb ibe ibf ibg ibi ibl ibr ibt ibz ie- iee ief ieg iei iel ier iet ifb ife iff ifg ifi ifl ifr ift ifz igb ige igf igg igi igl igr igt iib iie iif iii iil iir iit il- ilb ile ilf ilg ili ill ilr ilt ilz ir- irb ire irf irg iri irl irr irt itb ite itf itg iti itl itt itz ize izi izz lbb lbe lbf lbg lbi lbl lbr lbt leb lee lef leg lei lel ler let lez lfb lfe lff lfg lfi lfl lfr lft lgb lge lgf lgg lgi lgl lgr lgt lib lie lif lig lii lil lir lit liz llb lle llf llg lli lll llr llt llz lrb lrf lrg lri lrr lrt lrz ltb lte ltf ltg lti ltl ltr ltt ltz lzi lzr rbb rbe rbf rbg rbi rbl rbr rbt re- reb ree ref reg rei rel rer ret rez rfb rfe rff rfg rfi rfl rfr rft rfz rgb rge rgf rgg rgi rgr rgt rib rie rif rig rii ril rir rit riz rle rlf rlg rli rll rlr rlt rrb rrf rrg rri rrl rrr rrt rtb rte rtf rtg rti rtl rtr rtt rtz rzb rze tbb tbe tbf tbg tbi tbl tbr tbt tbz te- teb tee tef teg tei tel ter tet tez tfb tfe tff tfg tfi tfl tfr tft tgb tge tgf tgg tgi tgl tgr tgt tgz tib tie tif tig tii til tir tit tiz tle tlf tlg tli tll tlr tlt tlz trb tre trf trg tri trl trr trt trz ttb tte ttf ttg tti ttl ttr ttt tze tzf z-g zbb zbl zbr zbt zeb zee zef zel zer zet zez zfr zgb zgg zgi zib zie zif zig zil zir zit ziz zlr zlt zrl zte ztl ztr zzr zzt zzz