-er -ey b-u bbb bbe bbr bbs bbu bby be- beb bee ber bes beu bev bey brb bre brr brs bru brv bry bsb bse bsr bss bsu bsv bsy bub bue bur bus buu buy bvb bve bvr bvs bvu bvv by- bye byr bys byu ebb ebe ebr ebs ebu ebv eby eeb eee eer ees eev eey erb ere err ers eru erv ery es- esb ese esr ess esu esv esy eu- eub eue eur eus euv evb eve evr evs evv evy eye eyr eys rbb rbe rbr rbs rbu re- reb ree rer res reu rev rey rrb rrr rrs rru rsb rse rsr rss rsu rsv rub rue rur rus ruu ruv ruy rvb rve rvr rvs rvu rvv rvy ry- rye ryr rys ryu ryy sbb sbe sbr sbs sbu sbv sby se- seb see ser ses seu sev sey sr- srb sre srr srs srv sry ss- ssb sse ssr sss ssu ssv sub sue sur sus suu suv suy svb sve svr svs svu svv svy sy- syb sye syr sys syu ubb ube ubr ubs ubu ubv uby ueb uee uer ues uey ur- urb ure urr urs uru ury usb use usr uss usu usv uue uur uus uuu uvb uve uvs uvu uvv uys uyu v-e vbr vbs vbv veb vee ver ves veu vey vrb vre vrr vrs vru vry vsb vse vsr vss vsu vsv vue vur vus vuv vvb vvr vvs vvv vye ybe ybr ybs yby yeb yee yer yes yev yey yre yrs yru ysb yse ysr yss ysu ysy yue yur yus yuu yuv yuy yve yvr yvy yyb yye yys yyu yyy