-er -ol bbb bbe bbf bbi bbl bbo bbr bbt be- beb bee bef bei bel beo ber bet bfb bfe bff bfi bfl bfo bfr bft bi- bib bie bif bii bil bio bir bit blb ble blf bli bll blo blr blt bob boe bof boi bol boo bor bot brb bre brf bri brl bro brr brt btb bte btf bti btl bto btr btt ebb ebe ebf ebi ebl ebo ebr ebt eeb eee eef eel eeo eer eet ef- efb efe eff efi efl efo efr eft eib eie eif eii eil eio eir eit elb ele elf eli ell elo elr elt eo- eob eoe eof eoi eol eoo eor eot erb ere erf eri erl ero err ert etb ete etf eti etl eto etr ett fbb fbe fbf fbi fbl fbo fbr fbt feb fee fef fei fel feo fer fet ffe fff ffi ffl ffo ffr fft fib fie fif fii fil fir fit flb fle flf fli fll flo flr flt fob foe fof foi fol foo for fot frb fre frf fri frl fro frr frt ftb fte ftf fti ftl fto ftr ftt i-f ibb ibe ibf ibi ibl ibo ibr ibt ie- iee ief iei iel ier iet ifb ife iff ifi ifl ifo ifr ift iib iie iif iii iil iio iir iit il- ilb ile ilf ili ill ilo ilr ilt io- iob ioe iof ioi iol ioo ior iot ir- irb ire irf iri irl iro irr irt itb ite itf iti itl ito itt lbb lbe lbf lbi lbl lbo lbr lbt leb lee lef lei lel leo ler let lfb lfe lff lfi lfl lfo lfr lft lib lie lif lii lil lio lir lit llb lle llf lli lll llo llr llt lob loe lof loi lol loo lor lot lrb lrf lri lro lrr lrt ltb lte ltf lti ltl lto ltr ltt o-i ob- obb obe obf obi obl obo obr obt oeb oee oef oei oel oeo oer oet of- ofb ofe off ofi ofl ofo ofr oft oib oie oif oii oil oio oir oit olb ole olf oli oll olo olt oo- oob oof ooi ool ooo oor oot or- orb ore orf ori orl oro orr ort ot- otb ote otf oti otl oto otr ott rbb rbe rbf rbi rbl rbo rbr rbt re- reb ree ref rei rel reo rer ret rfb rfe rff rfi rfl rfo rfr rft rib rie rif rii ril rio rir rit rle rlf rli rll rlo rlr rlt rob roe rof roi rol roo ror rot rrb rrf rri rrl rrr rrt rtb rte rtf rti rtl rto rtr rtt tbb tbe tbf tbi tbl tbo tbr tbt te- teb tee tef tei tel teo ter tet tfb tfe tff tfi tfl tfo tfr tft tib tie tif tii til tio tir tit tle tlf tli tll tlo tlr tlt to- tob toe tof toi tol too tor tot trb tre trf tri trl tro trr trt ttb tte ttf tti ttl tto ttr ttt