-er -ey b-u bbb bbe bbg bbr bbu bby be- beb bee beg ber beu bey bgb bge bgg bgr bgu brb bre brg brr bru bry bub bue bug bur buu buy by- bye byg byr byu ebb ebe ebg ebr ebu eby eeb eee eeg eer eey egb ege egg egr egu egy erb ere erg err eru ery eu- eub eue eug eur eye eyr gbe gbg gbr gbu gby ge- geb gee geg ger geu gey ggb ggg ggr ggu grb gre grg grr gru gry gu- gub gue gug gur guu guy gy- gyb gye gyr rbb rbe rbg rbr rbu re- reb ree reg rer reu rey rgb rge rgg rgr rrb rrg rrr rru rub rue rug rur ruu ruy ry- rye ryg ryr ryu ryy ubb ube ubg ubr ubu uby ueb uee ueg uer uey ugb uge ugg ugr ugu ur- urb ure urg urr uru ury uue uug uur uuu uyu ybe ybg ybr yby yeb yee yeg yer yey yre yrg yru yue yug yur yuu yuy yyb yye yyg yyu yyy