b-u bbb bbi bbo bbr bbs bbu bi- bib bii bio bir bis biu biz bob boi boo bor bos bou boz brb bri bro brr brs bru brz bsb bsi bso bsr bss bsu bub bui buo bur bus buu buz bzo bzr bzs bzu bzz ibb ibi ibo ibr ibs ibu ibz iib iii iio iir iis iiu io- iob ioi ioo ior ios iou ir- irb iri iro irr irs iru is- isb isi iso isr iss isu iu- iub iui iur ius iuz izi izo izu izz o-i ob- obb obi obo obr obs obu oib oii oio oir ois oiu oiz oo- oob ooi ooo oor oos or- orb ori oro orr ors oru orz os- osb osi oso osr oss osu ou- oui ouo our ous ozo ozs ozu ozz rbb rbi rbo rbr rbs rbu rib rii rio rir ris riz rob roi roo ror ros rou roz rrb rri rrr rrs rru rsb rsi rso rsr rss rsu rub rui ruo rur rus ruu ruz rzb rzo sbb sbi sbo sbr sbs sbu sib sii sio sir sis siu sob soi soo sor sos sou soz sr- srb sri sro srr srs ss- ssb ssi sso ssr sss ssu ssz sub sui suo sur sus suu suz szi szr szu ubb ubi ubo ubr ubs ubu uib uii uio uir uis uiu uob uoo uor uos ur- urb uri uro urr urs uru urz usb usi uso usr uss usu usz uur uus uuu uzb uzi uzo uzu zbb zbr zbs zib zio zir zis ziz zo- zob zoi zoo zor zos zou zro zrs zsi zsu zsz zub zui zur zus zuz zzr zzs zzz

-ous bbbb bbbs bibb bibi bibo bibs biis bio- bioi bios biou birb biri biro birr birs biru bis- biso biss bisu bizu bizz bobb bobi bobo bobs bobu boi- boii bois boiu boob boor boos booz bor- bori boro borr bors boru borz bosi boso boss bosu bour bous bozi bozo brio bris briz brob broo bror bros brou broz brrr brrs brsb brsr brus bruz bsos bubb bubi bubo bubs bubu buir buis buiu bur- burb buri buro burr burs buru burz busi buss busu buus buuz buzi buzz bzou bzzz ibis ibos ibri ibro ibss ibus iiii iiio iiis iioi iioo iios iirs iisi iisr iisu iobi ioii ioio iooi iooo ioos iori iors ioso iosu ious iri- irio iris irob irri irrs irus isis iso- isor isos isri issi isso issr isss issu isus iuiu iuss izso izzo obbo obis oboi obor obos obri obro obsr obss obus oiii oios oisu oobi oooo ooos oosi oous oozi orbb orbi orbo orbs orbu ori- orio oris oro- oror oros oroz orri orro orrs orsi orso orsu orub orus orzo orzu osii osis osoi osoo osor osos osro ossb ossi osso ossu oubs ouii ouir ouis our- ouro ours ouu- ouzo rbbb rbbr rbbs rbis rbss rib- ribo ribs ribu riis rios riou rioz riri rirs risi riso riss risu rius rizi rizu rizz rob- robb robi robo robs robu roio roir rois roiu roiz roob rooi roor roos rooz rori roro roru rosi roso ross roub rous rouz rozi rozz rrrr rsbi rsis rsos rubb rubi rubs rubu ruis ruiz ruri ruro rurs ruru rusi ruso russ rusu ruzi s-ib s-ii s-os sbbs sbor sbsi sbus sibi sibo sibs sibu sior sios siou siri siro sirr sirs siru sisi siss sisu siui sius sizz sobo sobr sobs sobu soir sois soor soos sorb sori soro sorr sors soru sosi soso soss sour sous soz- sozi srib sris sros srub srzu ssbr ssis ssri ssrs sssb sssi ssss sub- subb subi subo subs subz suio suir suis suor suos sur- suri suro surr surs suru sus- susi suso suss susu susz suus suzi suzo suzu suzz szis szob szss szur ubbi ubbo ubii ubir ubis ubos uirr uor- urbi urbs urib uris uriu uro- uroo urri ursi urso urss ursu urur urus uruz usbr usbs usis usoi usos ussb ussr usss ussu usui usus uuri uusi uuuu uzis uzos uzzi z-ro zbus zibo ziri ziro zisi zizi zizz zobo zoio zois zoo- zoos zorb zori zoro zors zoso zoss zozo zozu zsss zubi zubo zubr zubu zuoz zurb zurr zuru zusi zuzu zzzs zzzz

bbuss bibbo bibbs bibio bibis bibos bibri bibus bioss biros birou birrs birur bisou bizou bizzi bizzo bo-bo bobbi bobos bobr bobri boios boiro boobs boors booru borbo borio boris boro- boroo boros borou borro borsi borsu borus borzu bosio bosor bossi bosso bouri bours bozoo bozos briou brisb brisi briss brizo brizz brobo brobs broos bross brous brrrr bruis bruiu bruri bruss bruzz bsous burbs burio buroo buros buroz burri burro burrs burru bursz burus busir busso bussu busur busuu buzzi buzzr 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 isuus isuzu izori izuus o-r-b oboro obosi obzor ooioo ooooo orbis orbus oribi orius orobo orosi oroso orosu orosz orris orsis oruro orzos ososo ossi- ossis ossos ossur osubi osusu osusz ouir- ouoro ouzos ozius ozoir ozoro ribbi ribo- riisu risso risus rizzi rizzo ro-ro robbi robbo robbs robo- robor robur roosi rorbu roriz rosis rossi rosso rosss rosu rozzi rubbi rubio rubis rubor rubus ruiru rusio rusor russi russo s-bus s-iii s-o-r sibir sibiu sibor sibos sibsu sibur sirio siris siriu siriz siror siros sirsi sirur sisis sisor sissi sissu siuri siuru siusi so-so sobor sobri soirs soori sooru soosi sorbo sorbs sorio soror soros sorso sorsu sorus soss- sossi sosui sosus souri sours sourz sous- sozis sozo- sssrb sssss subbu subis suboi subos subss suibu surbo surir suris suroz surui surur surus susso susus susuz ubirr ubisi ubobo ubris uibis uiro urbis urbos uroob uros urour urous urris urroz ursus urubu ururi urusi usobi usour ususi uusis uuuuu zbrui zibib ziros zizoo zizzi zobos zorbo