b-u bbb bbc bbk bbn bbo bbr bbs bbt bbu bcb bcc bck bcn bco bcr bcs bct bcu bkb bkc bkk bkn bko bkr bks bkt bnb bnc bnk bnn bno bnr bns bnt bnu bob boc bok bon boo bor bos bot bou brb brk brn bro brr brs brt bru bsb bsc bsk bsn bso bsr bss bst bsu btb btc btk btn bto btr bts btt btu bub buc buk bun buo bur bus but buu c-- cbb cbc cbk cbn cbo cbr cbs cbt cbu ccb ccc cck ccn cco ccr ccs cct ccu ckb ckc cko cks ckt cn- cnb cnc cnn cno cnr cns cnt cnu co- cob coc cok con coo cor cos cot cou crb crc crk crn cro crr crs crt cru csb csc csk csn cso csr css cst csu ctb ctc ctk ctn cto ctr cts ctt ctu cub cuc cuk cun cuo cur cus cut cuu k-t kbb kbc kbk kbn kbo kbr kbs kbu kcb kcc kck kcn kcr kcs kct kcu kkb kkc kkk kkn kkr kks kkt kku kn- knc knk knn kno knr knt knu kob koc kok kon koo kor kos kot kou krc krk krn kro krr krs krt kru ksb ksc ksk ksn kso ksr kss kst ksu ktb ktc ktk ktn kto ktr kts ktt ktu kub kuc kuk kun kur kus kut kuu nbb nbc nbk nbn nbo nbr nbs nbt nbu ncb ncc nck ncn nco ncr ncs nct ncu nkc nkk nkn nko nkr nks nkt nku nnb nnc nnk nnn nno nns nnt nnu no- nob noc nok non noo nor nos not nou nrb nrc nrk nrn nro nrr nrs nrt nru nsb nsc nsk nsn nso nsr nss nst nsu ntb ntc ntk ntn nto ntr nts ntt ntu nub nuc nuk nun nuo nur nus nut nuu ob- obb obc obk obn obo obr obs obt obu oc- ocb occ ock ocn oco ocr ocs oct ocu okb okc okk oko okr oks oku on- onb onc onk onn ono onr ons ont onu oo- oob ooc ook oon ooo oor oos oot or- orb orc ork orn oro orr ors ort oru os- osb osc osk osn oso osr oss ost osu ot- otb otc otk otn oto otr ots ott otu ou- ouc ouk oun ouo our ous out rbb rbc rbk rbn rbo rbr rbs rbt rbu rcb rcc rcn rco rcr rcs rct rcu rkb rkc rkk rko rks rkt rku rnb rnc rnn rno rnr rns rnt rnu rob roc rok ron roo ror ros rot rou rrb rrc rrk rrn rrr rrs rrt rru rsb rsc rsk rsn rso rsr rss rst rsu rtb rtc rtk rtn rto rtr rts rtt rtu rub ruc ruk run ruo rur rus rut ruu sbb sbc sbk sbn sbo sbr sbs sbt sbu scb scc sck scn sco scr scs sct scu sk- skb skc skk sko skr sks skt sku snb snc snk snn sno snr sns snt snu sob soc sok son soo sor sos sot sou sr- srb src srk srn sro srr srs srt ss- ssb ssc ssk ssn sso ssr sss sst ssu stb stc stk stn sto str sts stt stu sub suc suk sun suo sur sus sut suu tbb tbc tbk tbn tbo tbr tbs tbt tbu tcb tcc tck tcn tco tcr tcs tct tcu tkb tkc tkk tko tkr tks tkt tnb tnc tnk tnn tno tnr tns tnt to- tob toc tok ton too tor tos tot tou trb trc trk trn tro trr trs trt tru tsb tsc tsk tsn tso tsr tss tst tsu ttb ttc ttk ttn tto ttr tts ttt ttu tub tuc tuk tun tuo tur tus tut tuu ubb ubc ubk ubn ubo ubr ubs ubt ubu ucb ucc uck ucn uco ucr ucs uct ucu ukb ukc ukk ukn ukr uku un- unb unc unk unn uno unr uns unt unu uob uoc uok uon uoo uor uos uot ur- urb urc urk urn uro urr urs urt uru usb usc usk usn uso usr uss ust usu utb utc utk utn uto utr uts utt utu uuc uun uur uus uut uuu

-ous bbbb bbbs bbrc bcbc bcbs bccc bccs bcnu bcor bcos bcrs bcru bcsc bcsn bcss bctc bcts bcuc bnoc bnor bnrr bnss bobb bobo bobs bobu bock boco bocs bocu bokn boko boks boku bonc bonk bonn bono bons bont bonu boob booc book boon boor boos boot bor- bork born boro borr bors bort boru bosc bosk bosn boso boss bost bosu botb botn boto bots bott bouk boun bour bous bout brcb brkb brno brns brob broc brok bron broo bror bros brot brou brrr brrs brsb brsr brst brtc bruc brun brus brut bscs bskt bsns bson bsos bssc bsts btcc btcs btob btor btrc btrt btss bttb btus bubb bubo bubs bubu bucc buck buco bucs bucu bukk buko buku bunb bunk bunn buno buns bunt bunu buon bur- burb burk burn buro burr burs burt buru busc busk buss bust busu but- buto buts butt buus c-bo cbbc cbbs cbcc cbcn cbcr cbcs cbct cbcu cbkn cbko cbkr cbot cbrn cbrt cbsc cbsn cbtc cbus ccbc ccbn cccb cccc cccs cccu ccnb ccnc ccnr ccns ccnu ccob ccoc ccrc ccrs ccrt ccsn ccss ccst cctb cctc cctt ccuc ccus ccut ckbc ckck ckco ckcs cknb cknc ckns cknt ckob ckoc ckoo ckor ckos ckot ckrc cksb ckso ckst cktb ckts cnbc cnco cnrc cnrr cnrt cnss cntc cntk cntr cnut cobb cobo cobs cobu cock coco coct cocu cok- coko con- conc conk conn cono cons cont coob cook coon coos coot cor- corb corc cork corn coro corr cors cort cosc coso coss cost cotb cotc cotn coto cots cott cotu coub couk coun cour cous cout crbc crbu crcc crcr crkc crns crob croc crok cron croo cror crot crrt