-er -ey bbb bbe bbg bbo bbr bby be- beb bee beg beo ber bey bgb bge bgg bgo bgr bob boe bog boo bor boy brb bre brg bro brr bry by- bye byg byo byr ebb ebe ebg ebo ebr eby eeb eee eeg eeo eer eey egb ege egg ego egr egy eo- eob eoe eog eoo eor erb ere erg ero err ery eye eyo eyr gbe gbg gbo gbr gby ge- geb gee geg geo ger gey ggb ggg ggo ggr gob goe gog goo gor goy grb gre grg gro grr gry gy- gyb gye gyo gyr ob- obb obe obg obo obr oby oeb oee oeg oeo oer oey oge ogg ogo ogy oo- oob oog ooo oor or- orb ore org oro orr ory oye oyo rbb rbe rbg rbo rbr re- reb ree reg reo rer rey rgb rge rgg rgo rgr rob roe rog roo ror roy rrb rrg rrr ry- rye ryg ryo ryr ryy ybe ybg ybr yby yeb yee yeg yeo yer yey ygo yob yoe yog yoo yor yoy yre yrg yro yyb yye yyg yyy