-er -ey b-u bbb bbe bbf bbn bbo bbr bbu bby be- beb bee bef ben beo ber beu bey bfb bfe bff bfn bfo bfr bfu bfy bnb bne bnf bnn bno bnr bnu bob boe bof bon boo bor bou boy brb bre brf brn bro brr bru bry bub bue buf bun buo bur buu buy by- bye byf byn byo byr byu ebb ebe ebf ebn ebo ebr ebu eby eeb eee eef een eeo eer eey ef- efb efe eff efo efr en- enb ene enf enn eno enr enu eny eo- eob eoe eof eon eoo eor eou erb ere erf ern ero err eru ery eu- eub eue euf eun eur eye eyn eyo eyr fbb fbe fbf fbn fbo fbr fbu feb fee fef fen feo fer feu fey ffe fff ffn ffo ffr ffu ffy fnb fne fnf fnn fnr fnu fob foe fof fon foo for fou foy frb fre frf frn fro frr fru fry fub fue fuf fun fuo fur fuu fy- fyb fye fyn fyo nbb nbe nbf nbn nbo nbr nbu ne- neb nee nef nen neo ner neu ney nfb nfe nff nfn nfo nfr nfu nnb nne nnf nnn nno nnu no- nob noe nof non noo nor nou noy nrb nre nrf nrn nro nrr nru nry nub nue nun nuo nur nuu nuy nye nyf nyn nyo nyu nyy ob- obb obe obf obn obo obr obu oby oeb oee oef oen oeo oer oey of- ofb ofe off ofn ofo ofr ofu on- onb one onf onn ono onr onu ony oo- oob oof oon ooo oor or- orb ore orf orn oro orr oru ory ou- oue ouf oun ouo our oye oyo rbb rbe rbf rbn rbo rbr rbu re- reb ree ref ren reo rer reu rey rfb rfe rff rfn rfo rfr rfu rnb rnn rno rnr rnu rny rob roe rof ron roo ror rou roy rrb rrf rrn rrr rru rub rue ruf run ruo rur ruu ruy ry- rye ryf ryn ryo ryr ryu ryy ubb ube ubf ubn ubo ubr ubu uby ueb uee uef uen uer uey ufe uff ufn ufo ufr ufu un- unb une unf unn uno unr unu uny uob uoe uon uoo uor ur- urb ure urf urn uro urr uru ury uue uun uur uuu uyo uyu ybe ybf ybr yby yeb yee yef yen yeo yer yey yfe yff yfr yfu yne ynn ynu yny yob yoe yof yon yoo yor you yoy yre yrf yrn yro yru yue yun yuo yur yuu yuy yyb yye yyf yyu yyy