-er -ey b-u bbb bbe bbo bbr bbu bby be- beb bee beo ber beu bev bey bob boe boo bor bou bov boy brb bre bro brr bru brv bry bub bue buo bur buu buy bvb bve bvo bvr bvu bvv by- bye byo byr byu ebb ebe ebo ebr ebu ebv eby eeb eee eeo eer eev eey eo- eob eoe eoo eor eou erb ere ero err eru erv ery eu- eub eue eur euv evb eve evo evr evv evy eye eyo eyr ob- obb obe obo obr obu obv oby oeb oee oeo oer oey oo- oob ooo oor oov or- orb ore oro orr oru orv ory ou- oue ouo our ov- ovb ove ovo ovv oye oyo rbb rbe rbo rbr rbu re- reb ree reo rer reu rev rey rob roe roo ror rou rov roy rrb rrr rru rub rue ruo rur ruu ruv ruy rvb rve rvo rvr rvu rvv rvy ry- rye ryo ryr ryu ryy ubb ube ubo ubr ubu ubv uby ueb uee uer uey uob uoe uoo uor ur- urb ure uro urr uru ury uue uur uuu uvb uve uvo uvu uvv uyo uyu v-e vbo vbr vbv veb vee veo ver veu vey vob voe voo vor vou vov voy vrb vre vrr vru vry vue vur vuv vvb vvo vvr vvv vye ybe ybr yby yeb yee yeo yer yev yey yob yoe yoo yor you yoy yre yro yru yue yuo yur yuu yuv yuy yve yvo yvr yvy yyb yye yyu yyy