b-u bbb bbi bbo bbr bbs bbu bi- bib bii bio bir bis biu biv bob boi boo bor bos bou bov brb bri bro brr brs bru brv bsb bsi bso bsr bss bsu bsv bub bui buo bur bus buu bvb bvi bvo bvr bvs bvu bvv i-v ibb ibi ibo ibr ibs ibu ibv iib iii iio iir iis iiu io- iob ioi ioo ior ios iou iov ir- irb iri iro irr irs iru irv is- isb isi iso isr iss isu isv iu- iub iui iur ius ivb ivi ivo ivr ivs ivu ivv o-i ob- obb obi obo obr obs obu obv oib oii oio oir ois oiu oiv oo- oob ooi ooo oor oos oov or- orb ori oro orr ors oru orv os- osb osi oso osr oss osu osv ou- oui ouo our ous ov- ovb ovi ovo ovs ovv rbb rbi rbo rbr rbs rbu rib rii rio rir ris riv rob roi roo ror ros rou rov rrb rri rrr rrs rru rsb rsi rso rsr rss rsu rsv rub rui ruo rur rus ruu ruv rvb rvi rvo rvr rvs rvu rvv sbb sbi sbo sbr sbs sbu sbv sib sii sio sir sis siu siv sob soi soo sor sos sou sov sr- srb sri sro srr srs srv ss- ssb ssi sso ssr sss ssu ssv sub sui suo sur sus suu suv svb svi svo svr svs svu svv ubb ubi ubo ubr ubs ubu ubv uib uii uio uir uis uiu uob uoo uor uos ur- urb uri uro urr urs uru usb usi uso usr uss usu usv uur uus uuu uvb uvo uvs uvu uvv vbi vbo vbr vbs vbv vi- vib vii vio vir vis viu viv vob voi voo vor vos vou vov vrb vri vrr vrs vru vsb vsi vso vsr vss vsu vsv vur vus vuv vvb vvi vvo vvr vvs vvv

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bbuss bibbo bibbs bibio bibis bibos bibri bibus bioss biros birou birrs birur bisou bivio bivis bo-bo bobbi bobos bobov bobr bobri boios boiro boobs boors booru borbo borio boris boro- boroo boros borou borov borro borsi borsu borus borvo bosio bosor bossi bosso bouri bours bovi- bovio bovis briou brisb brisi briss brivo brobo brobs broos bross brous brrrr bruis bruiu bruri bruss bruvs bsous burbs burio buroo buros burov burri burro burrs burru burus busir busso bussu busur busuu ibbur ibibo ibros iiiii iiris iisir ioooi ioooo iorio irbis irios iris- iriss irisu irobo irori irour irous irssi is-is isios isiro isisi isour isrib issor issou issru issus issuu isurv isuus ivbss ivors ivvvo o-r-b oboro obosi obrov obvio ooioo ooooo oovoo orbis orbus oribi orius orobo orosi oroso orosu orris orsis oruro orvis ososo ossi- ossis ossos ossur osubi osusu ouir- ouoro ovios oviri ovivo ovoos ribbi ribo- riisu risso risus ro-ro robbi robbo robbs robo- robor robur roosi rorbu rosis rossi rosso rosss rosu rovio rubbi rubio rubis rubor rubus ruiru rusio rusor rusov russi russo rvivr s-bus s-iii s-ivb s-o-r sibir sibiu sibor sibos sibsu sibur sirio siris siriu siror siros sirsi sirur siruv sisis sisor sissi sissu siuri siuru siusi sivir so-so sobor sobri soirs soori sooru soosi sorbo sorbs sorio soror soros sorso sorsu sorus soss- sossi sosui sosus souri sours sous- sssrb sssss subbu subis suboi subos subss suibu surbo surir suris surov surui surur surus susso