-er -ey b-u bbb bbe bbf bbg bbo bbr bbu bby be- beb bee bef beg beo ber beu bey bfb bfe bff bfg bfo bfr bfu bfy bgb bge bgf bgg bgo bgr bgu bob boe bof bog boo bor bou boy brb bre brf brg bro brr bru bry bub bue buf bug buo bur buu buy by- bye byf byg byo byr byu ebb ebe ebf ebg ebo ebr ebu eby eeb eee eef eeg eeo eer eey ef- efb efe eff efg efo efr egb ege egf egg ego egr egu egy eo- eob eoe eof eog eoo eor eou erb ere erf erg ero err eru ery eu- eub eue euf eug eur eye eyo eyr fbb fbe fbf fbg fbo fbr fbu feb fee fef feg feo fer feu fey ffe fff ffg ffo ffr ffu ffy fgb fge fgf fgg fgr fob foe fof fog foo for fou foy frb fre frf frg fro frr fru fry fub fue fuf fug fuo fur fuu fy- fyb fye fyo gbe gbf gbg gbo gbr gbu gby ge- geb gee gef geg geo ger geu gey gfb gfe gff gfo gfr gfy ggb ggg ggo ggr ggu gob goe gof gog goo gor gou goy grb gre grf grg gro grr gru gry gu- gub gue guf gug guo gur guu guy gy- gyb gye gyf gyo gyr ob- obb obe obf obg obo obr obu oby oeb oee oef oeg oeo oer oey of- ofb ofe off ofg ofo ofr ofu oge ogf ogg ogo ogy oo- oob oof oog ooo oor or- orb ore orf org oro orr oru ory ou- oue ouf ouo our oye oyo rbb rbe rbf rbg rbo rbr rbu re- reb ree ref reg reo rer reu rey rfb rfe rff rfg rfo rfr rfu rgb rge rgf rgg rgo rgr rob roe rof rog roo ror rou roy rrb rrf rrg rrr rru rub rue ruf rug ruo rur ruu ruy ry- rye ryf ryg ryo ryr ryu ryy ubb ube ubf ubg ubo ubr ubu uby ueb uee uef ueg uer uey ufe uff ufg ufo ufr ufu ugb uge ugf ugg ugo ugr ugu uob uoe uog uoo uor ur- urb ure urf urg uro urr uru ury uue uug uur uuu uyo uyu ybe ybf ybg ybr yby yeb yee yef yeg yeo yer yey yfe yff yfr yfu ygo yob yoe yof yog yoo yor you yoy yre yrf yrg yro yru yue yug yuo yur yuu yuy yyb yye yyf yyg yyu yyy