-er -ey bbb bbe bbf bbi bbo bbr bby be- beb bee bef bei beo ber bey bfb bfe bff bfi bfo bfr bfy bi- bib bie bif bii bio bir biy bob boe bof boi boo bor boy brb bre brf bri bro brr bry by- bye byf byi byo byr ebb ebe ebf ebi ebo ebr eby eeb eee eef eeo eer eey ef- efb efe eff efi efo efr eib eie eif eii eio eir eo- eob eoe eof eoi eoo eor erb ere erf eri ero err ery eye eyo eyr fbb fbe fbf fbi fbo fbr feb fee fef fei feo fer fey ffe fff ffi ffo ffr ffy fib fie fif fii fir fob foe fof foi foo for foy frb fre frf fri fro frr fry fy- fyb fye fyi fyo i-f ibb ibe ibf ibi ibo ibr iby ie- iee ief iei ier iey ifb ife iff ifi ifo ifr ify iib iie iif iii iio iir io- iob ioe iof ioi ioo ior ir- irb ire irf iri iro irr iry iye iyo iyr iyy o-i ob- obb obe obf obi obo obr oby oeb oee oef oei oeo oer oey of- ofb ofe off ofi ofo ofr oib oie oif oii oio oir oo- oob oof ooi ooo oor or- orb ore orf ori oro orr ory oye oyi oyo rbb rbe rbf rbi rbo rbr re- reb ree ref rei reo rer rey rfb rfe rff rfi rfo rfr rib rie rif rii rio rir riy rob roe rof roi roo ror roy rrb rrf rri rrr ry- rye ryf ryo ryr ryy ybe ybf ybi ybr yby yeb yee yef yei yeo yer yey yfe yff yfr yie yif yii yio yir yob yoe yof yoi yoo yor yoy yre yrf yro yyb yye yyf yyy