-er -ey b-u bbb bbe bbn bbo bbr bbu bby be- beb bee ben beo ber beu bey bnb bne bnn bno bnr bnu bob boe bon boo bor bou boy brb bre brn bro brr bru bry bub bue bun buo bur buu buy by- bye byn byo byr byu ebb ebe ebn ebo ebr ebu eby eeb eee een eeo eer eey en- enb ene enn eno enr enu eny eo- eob eoe eon eoo eor eou erb ere ern ero err eru ery eu- eub eue eun eur eye eyn eyo eyr nbb nbe nbn nbo nbr nbu ne- neb nee nen neo ner neu ney nnb nne nnn nno nnu no- nob noe non noo nor nou noy nrb nre nrn nro nrr nru nry nub nue nun nuo nur nuu nuy nye nyn nyo nyu nyy ob- obb obe obn obo obr obu oby oeb oee oen oeo oer oey on- onb one onn ono onr onu ony oo- oob oon ooo oor or- orb ore orn oro orr oru ory ou- oue oun ouo our oye oyo rbb rbe rbn rbo rbr rbu re- reb ree ren reo rer reu rey rnb rnn rno rnr rnu rny rob roe ron roo ror rou roy rrb rrn rrr rru rub rue run ruo rur ruu ruy ry- rye ryn ryo ryr ryu ryy ubb ube ubn ubo ubr ubu uby ueb uee uen uer uey un- unb une unn uno unr unu uny uob uoe uon uoo uor ur- urb ure urn uro urr uru ury uue uun uur uuu uyo uyu ybe ybr yby yeb yee yen yeo yer yey yne ynn ynu yny yob yoe yon yoo yor you yoy yre yrn yro yru yue yun yuo yur yuu yuy yyb yye yyu yyy