-er -ey bbb bbe bbi bbo bbr bby be- beb bee bei beo ber bev bey bi- bib bie bii bio bir biv biy bob boe boi boo bor bov boy brb bre bri bro brr brv bry bvb bve bvi bvo bvr bvv by- bye byi byo byr ebb ebe ebi ebo ebr ebv eby eeb eee eeo eer eev eey eib eie eii eio eir eiv eo- eob eoe eoi eoo eor erb ere eri ero err erv ery evb eve evi evo evr evv evy eye eyo eyr i-v ibb ibe ibi ibo ibr ibv iby ie- iee iei ier iev iey iib iie iii iio iir io- iob ioe ioi ioo ior iov ir- irb ire iri iro irr irv iry ivb ive ivi ivo ivr ivv ivy iye iyo iyr iyy o-i ob- obb obe obi obo obr obv oby oeb oee oei oeo oer oey oib oie oii oio oir oiv oo- oob ooi ooo oor oov or- orb ore ori oro orr orv ory ov- ovb ove ovi ovo ovv oye oyi oyo rbb rbe rbi rbo rbr re- reb ree rei reo rer rev rey rib rie rii rio rir riv riy rob roe roi roo ror rov roy rrb rri rrr rvb rve rvi rvo rvr rvv rvy ry- rye ryo ryr ryy v-e vbi vbo vbr vbv veb vee vei veo ver vey vi- vib vie vii vio vir viv viy vob voe voi voo vor vov voy vrb vre vri vrr vry vvb vvi vvo vvr vvv vye ybe ybi ybr yby yeb yee yei yeo yer yev yey yie yii yio yir yob yoe yoi yoo yor yoy yre yro yve yvi yvo yvr yvy yyb yye yyy