-er -ol bbb bbe bbf bbi bbl bbo bbr be- beb bee bef bei bel beo ber bfb bfe bff bfi bfl bfo bfr bi- bib bie bif bii bil bio bir blb ble blf bli bll blo blr bob boe bof boi bol boo bor brb bre brf bri brl bro brr ebb ebe ebf ebi ebl ebo ebr eeb eee eef eel eeo eer ef- efb efe eff efi efl efo efr eib eie eif eii eil eio eir elb ele elf eli ell elo elr eo- eob eoe eof eoi eol eoo eor erb ere erf eri erl ero err fbb fbe fbf fbi fbl fbo fbr feb fee fef fei fel feo fer ffe fff ffi ffl ffo ffr fib fie fif fii fil fir flb fle flf fli fll flo flr fob foe fof foi fol foo for frb fre frf fri frl fro frr i-f ibb ibe ibf ibi ibl ibo ibr ie- iee ief iei iel ier ifb ife iff ifi ifl ifo ifr iib iie iif iii iil iio iir il- ilb ile ilf ili ill ilo ilr io- iob ioe iof ioi iol ioo ior ir- irb ire irf iri irl iro irr lbb lbe lbf lbi lbl lbo lbr leb lee lef lei lel leo ler lfb lfe lff lfi lfl lfo lfr lib lie lif lii lil lio lir llb lle llf lli lll llo llr lob loe lof loi lol loo lor lrb lrf lri lro lrr o-i ob- obb obe obf obi obl obo obr oeb oee oef oei oel oeo oer of- ofb ofe off ofi ofl ofo ofr oib oie oif oii oil oio oir olb ole olf oli oll olo oo- oob oof ooi ool ooo oor or- orb ore orf ori orl oro orr rbb rbe rbf rbi rbl rbo rbr re- reb ree ref rei rel reo rer rfb rfe rff rfi rfl rfo rfr rib rie rif rii ril rio rir rle rlf rli rll rlo rlr rob roe rof roi rol roo ror rrb rrf rri rrl rrr