-er -ey bbb bbe bbf bbn bbo bbr bby be- beb bee bef ben beo ber bey bfb bfe bff bfn bfo bfr bfy bnb bne bnf bnn bno bnr bob boe bof bon boo bor boy brb bre brf brn bro brr bry by- bye byf byn byo byr ebb ebe ebf ebn ebo ebr eby eeb eee eef een eeo eer eey ef- efb efe eff efo efr en- enb ene enf enn eno enr eny eo- eob eoe eof eon eoo eor erb ere erf ern ero err ery eye eyn eyo eyr fbb fbe fbf fbn fbo fbr feb fee fef fen feo fer fey ffe fff ffn ffo ffr ffy fnb fne fnf fnn fnr fob foe fof fon foo for foy frb fre frf frn fro frr fry fy- fyb fye fyn fyo nbb nbe nbf nbn nbo nbr ne- neb nee nef nen neo ner ney nfb nfe nff nfn nfo nfr nnb nne nnf nnn nno no- nob noe nof non noo nor noy nrb nre nrf nrn nro nrr nry nye nyf nyn nyo nyy ob- obb obe obf obn obo obr oby oeb oee oef oen oeo oer oey of- ofb ofe off ofn ofo ofr on- onb one onf onn ono onr ony oo- oob oof oon ooo oor or- orb ore orf orn oro orr ory oye oyo rbb rbe rbf rbn rbo rbr re- reb ree ref ren reo rer rey rfb rfe rff rfn rfo rfr rnb rnn rno rnr rny rob roe rof ron roo ror roy rrb rrf rrn rrr ry- rye ryf ryn ryo ryr ryy ybe ybf ybr yby yeb yee yef yen yeo yer yey yfe yff yfr yne ynn yny yob yoe yof yon yoo yor yoy yre yrf yrn yro yyb yye yyf yyy