-er bbb bbe bbi bbl bbr bbt be- beb bee bei bel ber bet bez bi- bib bie bii bil bir bit biz blb ble bli bll blr blt blz brb bre bri brl brr brt brz btb bte bti btl btr btt btz bze bzr bzz ebb ebe ebi ebl ebr ebt eeb eee eel eer eet eib eie eii eil eir eit elb ele eli ell elr elt elz erb ere eri erl err ert erz etb ete eti etl etr ett etz eze ezr ezz ibb ibe ibi ibl ibr ibt ibz ie- iee iei iel ier iet iib iie iii iil iir iit il- ilb ile ili ill ilr ilt ilz ir- irb ire iri irl irr irt itb ite iti itl itt itz ize izi izz lbb lbe lbi lbl lbr lbt leb lee lei lel ler let lez lib lie lii lil lir lit liz llb lle lli lll llr llt llz lrb lri lrr lrt lrz ltb lte lti ltl ltr ltt ltz lzi lzr rbb rbe rbi rbl rbr rbt re- reb ree rei rel rer ret rez rib rie rii ril rir rit riz rle rli rll rlr rlt rrb rri rrl rrr rrt rtb rte rti rtl rtr rtt rtz rzb rze tbb tbe tbi tbl tbr tbt tbz te- teb tee tei tel ter tet tez tib tie tii til tir tit tiz tle tli tll tlr tlt tlz trb tre tri trl trr trt trz ttb tte tti ttl ttr ttt tze zbb zbl zbr zbt zeb zee zel zer zet zez zib zie zil zir zit ziz zlr zlt zrl zte ztl ztr zzr zzt zzz