-er -ey b-u bbb bbe bbi bbk bbo bbr bbu bby be- beb bee bei bek beo ber beu bev bey bi- bib bie bii bik bio bir biu biv biy bkb bke bkk bko bkr bkv bob boe boi bok boo bor bou bov boy brb bre bri brk bro brr bru brv bry bub bue bui buk buo bur buu buy bvb bve bvi bvk bvo bvr bvu bvv by- bye byi byk byo byr byu ebb ebe ebi ebk ebo ebr ebu ebv eby eeb eee eek eeo eer eev eey eib eie eii eik eio eir eiu eiv ekb eke eki eko ekr eku ekv eky eo- eob eoe eoi eok eoo eor eou erb ere eri erk ero err eru erv ery eu- eub eue eui eur euv evb eve evi evo evr evv evy eye eyo eyr i-v ibb ibe ibi ibk ibo ibr ibu ibv iby ie- iee iei iek ier iev iey iib iie iii iio iir iiu ikb ike iki ikk iko ikr iku ikv io- iob ioe ioi ioo ior iou iov ir- irb ire iri irk iro irr iru irv iry iu- iub iue iui iur ivb ive ivi ivo ivr ivu ivv ivy iye iyo iyr iyy kbb kbe kbi kbk kbo kbr kbu ke- keb kee kei kek keo ker kev key kib kie kii kik kio kir kiu kiv kkb kke kki kkk kkr kku kkv kky kob koe koi kok koo kor kou koy kri krk kro krr kru krv kry kub kue kui kuk kur kuu kuy kvb kvi kvk kvo kvr kvv kye kyo kyr kyu o-i ob- obb obe obi obk obo obr obu obv oby oeb oee oei oeo oer oey oib oie oii oik oio oir oiu oiv okb oke oki okk oko okr oku oo- oob ooi ook ooo oor oov or- orb ore ori ork oro orr oru orv ory ou- oue oui ouk ouo our ov- ovb ove ovi ovo ovv oye oyi oyo rbb rbe rbi rbk rbo rbr rbu re- reb ree rei rek reo rer reu rev rey rib rie rii rik rio rir riv riy rkb rke rkk rko rku rkv rky rob roe roi rok roo ror rou rov roy rrb rri rrk rrr rru rub rue rui ruk ruo rur ruu ruv ruy rvb rve rvi rvo rvr rvu rvv rvy ry- rye ryk ryo ryr ryu ryy ubb ube ubi ubk ubo ubr ubu ubv uby ueb uee uei uer uey uib uie uii uio uir uiu ukb uke uki ukk ukr uku uob uoe uok uoo uor ur- urb ure uri urk uro urr uru ury uue uur uuu uvb uve uvo uvu uvv uyi uyo uyu v-e vbi vbk vbo vbr vbv veb vee vei vek veo ver veu vey vi- vib vie vii vik vio vir viu viv viy vkb vob voe voi vok voo vor vou vov voy vrb vre vri vrk vrr vru vry vue vuk vur vuv vvb vvi vvo vvr vvv vye ybe ybi ybr yby yeb yee yei yek yeo yer yev yey yie yii yio yir yki ykk yob yoe yoi yok yoo yor you yoy yre yro yru yue yui yuk yuo yur yuu yuv yuy yve yvi yvo yvr yvy yyb yye yyu yyy