-er -ey -up b-p b-u bbb bbe bbp bbr bbu bby be- beb bee bep ber beu bey bpb bpe bpp bpr bpu bpy brb bre brp brr bru bry bub bue bup bur buu buy by- bye byp byr byu ebb ebe ebp ebr ebu eby eeb eee eep eer eey ep- epb epe epp epr epu erb ere erp err eru ery eu- eub eue eup eur eye eyp eyr p-p pbb pbe pbp pbr pbu pby peb pee pep per peu pey ppb ppe ppp ppr ppu prb pre prp prr pru pry pub pue pup pur puu puy py- pyb pye pyr pyu rbb rbe rbp rbr rbu re- reb ree rep rer reu rey rpb rpe rpp rpr rpu rrb rrp rrr rru rub rue rup rur ruu ruy ry- rye ryr ryu ryy ubb ube ubp ubr ubu uby ueb uee uep uer uey up- upb upe upp upr upu ur- urb ure urp urr uru ury uue uur uuu uyu ybe ybp ybr yby yeb yee yep yer yey ypu yre yrp yru yue yup yur yuu yuy yyb yye yyu yyy