b-u bbb bbo bbr bbs bbt bbu bob boo bor bos bot bou boz brb bro brr brs brt bru brz bsb bso bsr bss bst bsu btb bto btr bts btt btu btz bub buo bur bus but buu buz bzo bzr bzs bzu bzz ob- obb obo obr obs obt obu oo- oob ooo oor oos oot or- orb oro orr ors ort oru orz os- osb oso osr oss ost osu ot- otb oto otr ots ott otu otz ou- ouo our ous out ozo ozs ozt ozu ozz rbb rbo rbr rbs rbt rbu rob roo ror ros rot rou roz rrb rrr rrs rrt rru rsb rso rsr rss rst rsu rtb rto rtr rts rtt rtu rtz rub ruo rur rus rut ruu ruz rzb rzo sbb sbo sbr sbs sbt sbu sob soo sor sos sot sou soz sr- srb sro srr srs srt ss- ssb sso ssr sss sst ssu ssz stb sto str sts stt stu stz sub suo sur sus sut suu suz szr szu tbb tbo tbr tbs tbt tbu tbz to- tob too tor tos tot tou toz trb tro trr trs trt tru trz tsb tso tsr tss tst tsu ttb tto ttr tts ttt ttu tub tuo tur tus tut tuu tuz tzs tzu ubb ubo ubr ubs ubt ubu uob uoo uor uos uot ur- urb uro urr urs urt uru urz usb uso usr uss ust usu usz utb uto utr uts utt utu utz uur uus uut uuu uzb uzo uzu zbb zbr zbs zbt zo- zob zoo zor zos zot zou zro zrs zst zsu zsz ztr zub zur zus zut zuz zzr zzs zzt zzz

-ous bbbb bbbs bobb bobo bobs bobu boob boor boos boot booz bor- boro borr bors bort boru borz boso boss bost bosu botb boto bots bott bour bous bout bozo brob broo bror bros brot brou broz brrr brrs brsb brsr brst brus brut bruz bsos bsts btob btor btrt btss bttb btus bubb bubo bubs bubu bur- burb buro burr burs burt buru burz buss bust busu but- buto buts butt butz buus buuz buzz bzou bzzt bzzz obbo obor obos obot obro obsr obss obst obts obus oooo ooos oort oost ootb oots oous orbb orbo orbs orbu oro- oror oros orot oroz orro orrs orso orsu orto orts orub orus orzo orzu osoo osor osos osro ossb osso ossu ostr osts otbs oto- otoo otor otos otro otrs otso otsu otto otts ottu otur otus oubs our- ouro ours ourt oust out- outb outo outs ouu- ouzo rbbb rbbr rbbs rbss rbst rob- robb robo robs robt robu roob roor roos root rooz roro rort roru roso ross rost roto rotr rots rott roub rous rout rouz rozz rrrr rsos rsts rstu rtss rtts rubb rubs rubu ruro rurs ruru ruso russ rust rusu ruto ruts rutt rutu s-os sbbs sbor sbot sbst sbus sobo sobr sobs sobt sobu soor soos soot sorb soro sorr sors sort soru soso soss sost soto sots sotu sour sous sout soz- sros srtr srub srzu ssbr ssot ssrs sssb ssss sstb ssts stbs stob stoo stor stos stot stou stro strs stru stss sttr stub stur stus stut sub- subb subo subs subz suor suos sur- suro surr surs surt suru sus- suso suss sust susu susz suto sutu suus suzo suzu suzz szob szot szss szur tbbs tbrb tbst tobo tobs tobt tobu toor toos toot toro torr tors tort toru tosb toso toss tost tosu toto totr tots tott tour tous tout tozo troo tros trot trou trst trtr trub trus trut truu tsob tsos tsou tssr tsst tsts ttbb ttss tttt tubb tubo tubr tubs tubu tuor tuos turb turo turr turs turt turu tuss tust tuto tuts tutt tutu tuuo tuzu tuzz tzur tzus tzut tzzt ubbo ubos uor- urbs uro- uroo urso urss ursu urts urur urus urut uruz usbr usbs usos ussb ussr usss usst ussu ustb usto usts usus utor utto uttu uuuu uzos z-ro zbus zobo zoo- zoos zoot zorb zoro zors zort zoso zoss zots zott zotz zozo zozu zsss ztst zubo zubr zubu zuoz zurb zurr zuru zust zuzu zzzs zzzz

bbuss bo-bo bobos bobr bobst bobts boobs boors boort booru boost boots borbo boro- boroo boros borot borou borro borst borsu borts bortz borus borut borzu bosor bosso bosut botos botou botro botts bottu botus bours boust bouto bouts bozoo bozos brobo brobs broos bross broto brous brout brrrr bruss brust bruzz bsous btr-t btstu burbs buroo buros buroz burro burrs burru burst bursz burts burtt burus burut busot busso bussu busto busts busur busut busuu buto- butor butot butou butts butuo butut buzzr bzots bzzzt o-r-b oboro obout obtus obzor ooooo ootus orbot orbus orobo oroso orost orosu orosz orout ortoo oruro orust orutu orzos ososo ossos ossur ostro osusu osusz otoso ototo otour otros ottos ottur otusz oubut ouoro ousts outro outto outts ouzos ozoro ro-ro robbo robbs robo- robor robot robrt robur roost roots rorbu rorts rosso rosss rosto rosts rosu roto- rotor rotos rotot rotto rotz rotzo roubt roust routs routt rsust rubor rubus rusor rusot russo rusts rustu ruutu s-bot s-bus s-o-r so-so sobor soort sooru soots sorbo sorbs sorbt soror soros sorso sorsu sorts sortu sorus soss- sosto sosus sotoo sotos sotsu sotto sotts sours sourz sous- souto sozo- sroot sssrb sssss stobs stoob stoor stoos stoot storb storo storr stors stort storz stoss stots stott stotz stour stout stros strot strrs strub strut sttrz stubo stubs sturb sturt stuss stutz subbu subos subss subst surbo surot suroz surtr surur surus susso susto susus susuz sutor sutot sutro sutto suttu sutzu tbtbt tbutt tobor tobot tobou toobs toost toots torob toros torro torrs torso torst torto torts tortu torus tosos toss- tosto toto- totoo totos totus touro tours toust touts trooz tross trost trots trott trous trout trubs trubu truro truso truss trust truus tsoro tsort tsubo tsuro