-up b-p b-u bbb bbk bbo bbp bbr bbs bbt bbu bkb bkk bko bkp bkr bks bkt bob bok boo bop bor bos bot bou bpb bpo bpp bpr bps bpt bpu brb brk bro brp brr brs brt bru bsb bsk bso bsp bsr bss bst bsu btb btk bto btp btr bts btt btu bub buk buo bup bur bus but buu k-t kbb kbk kbo kbp kbr kbs kbu kkb kkk kkp kkr kks kkt kku kob kok koo kop kor kos kot kou kpk kpo kpp kpr kps kpt kpu krk kro krp krr krs krt kru ksb ksk kso ksp ksr kss kst ksu ktb ktk kto ktp ktr kts ktt ktu kub kuk kup kur kus kut kuu ob- obb obk obo obp obr obs obt obu okb okk oko okp okr oks oku oo- oob ook ooo oop oor oos oot op- opb opk opo opp opr ops opt or- orb ork oro orp orr ors ort oru os- osb osk oso osp osr oss ost osu ot- otb otk oto otp otr ots ott otu ou- ouk ouo oup our ous out p-p pbb pbk pbo pbp pbr pbs pbt pbu pkb pko pkp pkr pks pkt pku pob pok poo pop por pos pot pou ppb ppk ppo ppp ppr pps ppt ppu prb prk pro prp prr prs prt pru ps- psb psk pso psp psr pss pst psu pt- ptb ptk pto ptp ptr pts ptt ptu pub puk pup pur pus put puu rbb rbk rbo rbp rbr rbs rbt rbu rkb rkk rko rkp rks rkt rku rob rok roo rop ror ros rot rou rpb rpk rpo rpp rpr rps rpt rpu rrb rrk rrp rrr rrs rrt rru rsb rsk rso rsp rsr rss rst rsu rtb rtk rto rtp rtr rts rtt rtu rub ruk ruo rup rur rus rut ruu sbb sbk sbo sbp sbr sbs sbt sbu sk- skb skk sko skp skr sks skt sku sob sok soo sop sor sos sot sou spb spk spo spp spr sps spt spu sr- srb srk sro srp srr srs srt ss- ssb ssk sso ssp ssr sss sst ssu stb stk sto stp str sts stt stu sub suk suo sup sur sus sut suu tbb tbk tbo tbp tbr tbs tbt tbu tkb tkk tko tkp tkr tks tkt to- tob tok too top tor tos tot tou tpb tpk tpo tpp tpr tps tpt tpu trb trk tro trp trr trs trt tru tsb tsk tso tsp tsr tss tst tsu ttb ttk tto ttp ttr tts ttt ttu tub tuk tuo tup tur tus tut tuu ubb ubk ubo ubp ubr ubs ubt ubu ukb ukk ukp ukr uku uob uok uoo uop uor uos uot up- upb upk upo upp upr ups upt upu ur- urb urk uro urp urr urs urt uru usb usk uso usp usr uss ust usu utb utk uto utp utr uts utt utu uur uus uut uuu

-ous bbbb bbbs bbpr bkpr bkpt bksp bobb bobo bobs bobu boko boks boku boob book boop boor boos boot bopp bops bor- bork boro borr bors bort boru bosk boso boss bost bosu botb boto bots bott bouk boup bour bous bout bpot bpsu brkb brob brok broo bror bros brot brou brrr brrs brsb brsr brst brup brus brut bskt bsos bspp bspr bsts bsup btbp btob btor btps btrt btss bttb btus bubb bubo bubs bubu bukk buko buku bups bur- burb burk buro burp burr burs burt buru busk buss bust busu but- buto buts butt buus k-os kbbb kbbk kbbo kbbr kbbs kbbt kbbu kbkb kbkk kbko kbkr kbob kbok kboo kbos kbot kbpk kbpo kbpr kbps kbpt kbpu kbrb kbrk kbro kbrt kbru kbsb kbsk kbso kbsr kbss kbst kbsu kbtb kbtk kbto kbtr kbts kbtt kbub kbuk kbup kbur kbus kbut kbuu kkbb kkbo kkbr kkbs kkbt kkkk kkob kkoo kkor kkot kkpk kkps kkpt kkrb kkrk kkro kkrr kkrs kkrt kksp kksr kkss kkst kksu kktk kkts kktu kkup kkus kkut kkuu kobb kobk kobo kobr kobs kobu kokb kokk koko kokp kokr koks koku koob kook kooo koop koor koos koot koou kopb kopp kopr kops kopt kopu korb kork koro korr kors kort koru kos- kosb koso kosp kosr koss kost kosu kotb kotk koto kotr kots kott kotu koub kour kous kout kouu kpbb kpbr kpbs kpkk kpkr kpob kpok kpoo kpop kpou kppk kppo kppp kppr kprb kprk kpro kprp kprr kprs kprt kpru kpso kpsp kpsu kpto kptr kpts kptt kpub kpur kpus krbb krbk krbr krbt krkk krko krkr krks krku krob krok kroo krop kror kros krpr krps krpt krpu krrb krrk krro krrr krrs krrt krsk krsr krss krst krsu krtk krto krtr krts kruk krup krur ksbp ksbr ksbs kskb kskk ksko kskr ksks ksku ksob ksok ksoo ksop ksor ksos ksou kspb kspk kspo kspr ksps kspt ksrb ksro ksrp ksrr ksrs ksrt ksso kssr ksss ksst kssu kstb kstk ksto kstp kstr ksts kstt kstu ksub ksup ksut ksuu ktbb ktbr ktbt ktbu ktkb ktkk ktko ktkr ktks ktkt ktku ktob ktok ktoo ktop ktor ktot ktpk ktpo ktpr ktpt ktrb ktrk ktro ktrp ktrr ktrs ktrt ktru ktso ktsr ktst ktsu kttk ktto kttp kttr ktts kttt kttu ktub kubb kubo kubr kubs kubu kukk kuks kuku kuok kuoo kuop kuos kupb kupr kups kupt kupu kurb kurk kuro kurr kurs kurt kuru kusb kuso kusp kust kusu kuto kutp kutr kuts kutt kutu kuub kuuk kuur kuuu obbo obkb obok obor obos obot obro obsr obss obst obts obus okko okok okor okot okpo okro okso okto okur okus ooku oooo ooos oops oort oost ootb ootp oots oous opo- opor opos oppo opps opsu opto opts opus orbb orbo orbs orbu orko oro- orok oror oros orot orps orro orrs orsk orso orsu orto orts orub orup orus osbp osku osoo osor