-th b-u bbb bbc bbh bbk bbn bbo bbr bbs bbt bbu bcb bcc bch bck bcn bco bcr bcs bct bcu bhb bhc bhh bhk bho bhr bhs bht bhu bkb bkc bkk bkn bko bkr bks bkt bnb bnc bnk bnn bno bnr bns bnt bnu bob boc boh bok bon boo bor bos bot bou brb brh brk brn bro brr brs brt bru bsb bsc bsh bsk bsn bso bsr bss bst bsu btb btc bth btk btn bto btr bts btt btu bub buc buh buk bun buo bur bus but buu c-- cbb cbc cbh cbk cbn cbo cbr cbs cbt cbu ccb ccc cch cck ccn cco ccr ccs cct ccu ch- chb chc chh chk chn cho chr chs cht chu ckb ckc ckh cko cks ckt cn- cnb cnc cnh cnn cno cnr cns cnt cnu co- cob coc coh cok con coo cor cos cot cou crb crc crh crk crn cro crr crs crt cru csb csc csh csk csn cso csr css cst csu ctb ctc cth ctk ctn cto ctr cts ctt ctu cub cuc cuh cuk cun cuo cur cus cut cuu hbb hbc hbh hbk hbn hbo hbr hbs hbt hbu hcb hcc hch hck hcn hco hcr hcs hct hhb hhc hhh hhk hhn hho hhr hhs hht hhu hkb hkh hkk hkn hko hkr hks hkt hku hnb hnc hnh hnk hnn hno hns hnt hnu hob hoc hoh hok hon hoo hor hos hot hou hr- hrb hrc hrh hrk hrn hro hrr hrs hrt hru hsb hsc hsh hsk hsn hsr hss hst hsu htb htc hth htk htn hto htr hts htt hub huc huh huk hun huo hur hus hut huu k-t kbb kbc kbh kbk kbn kbo kbr kbs kbu kcb kcc kch kck kcn kcr kcs kct kcu khh khk khn kho khr khs khu kkb kkc kkh kkk kkn kkr kks kkt kku kn- knc knk knn kno knr knt knu kob koc koh kok kon koo kor kos kot kou krc krk krn kro krr krs krt kru ksb ksc ksh ksk ksn kso ksr kss kst ksu ktb ktc kth ktk ktn kto ktr kts ktt ktu kub kuc kuh kuk kun kur kus kut kuu nbb nbc nbk nbn nbo nbr nbs nbt nbu ncb ncc nch nck ncn nco ncr ncs nct ncu nhb nhc nhh nhk nhn nhr nhs nht nhu nkc nkk nkn nko nkr nks nkt nku nnb nnc nnh nnk nnn nno nns nnt nnu no- nob noc noh nok non noo nor nos not nou nrb nrc nrk nrn nro nrr nrs nrt nru nsb nsc nsh nsk nsn nso nsr nss nst nsu ntb ntc nth ntk ntn nto ntr nts ntt ntu nub nuc nuh nuk nun nuo nur nus nut nuu ob- obb obc obh obk obn obo obr obs obt obu oc- ocb occ och ock ocn oco ocr ocs oct ocu ohc ohh ohn oho ohr ohs oht ohu okb okc okk oko okr oks oku on- onb onc onh onk onn ono onr ons ont onu oo- oob ooc ooh ook oon ooo oor oos oot or- orb orc orh ork orn oro orr ors ort oru os- osb osc osh osk osn oso osr oss ost osu ot- otb otc oth otk otn oto otr ots ott otu ou- ouc ouh ouk oun ouo our ous out rbb rbc rbh rbk rbn rbo rbr rbs rbt rbu rcb rcc rch rcn rco rcr rcs rct rcu rh- rhb rhc rhh rhn rho rhr rhs rht rhu rkb rkc rkk rko rks rkt rku rnb rnc rnh rnn rno rnr rns rnt rnu rob roc roh rok ron roo ror ros rot rou rrb rrc rrh rrk rrn rrr rrs rrt rru rsb rsc rsh rsk rsn rso rsr rss rst rsu rtb rtc rtk rtn rto rtr rts rtt rtu rub ruc ruh ruk run ruo rur rus rut ruu sbb sbc sbh sbk sbn sbo sbr sbs sbt sbu scb scc sch sck scn sco scr scs sct scu sh- shb shc shh shk shn sho shr shs sht shu sk- skb skc skh skk sko skr sks skt sku snb snc snk snn sno snr sns snt snu sob soc soh sok son soo sor sos sot sou sr- srb src srh srk srn sro srr srs srt ss- ssb ssc ssh ssk ssn sso ssr sss sst ssu stb stc sth stk stn sto str sts stt stu sub suc suh suk sun suo sur sus sut suu tbb tbc tbh tbk tbn tbo tbr tbs tbt tbu tcb tcc tch tck tcn tco tcr tcs tct tcu th- thb thc thh thk thn tho thr ths tht thu tkb tkc tkk tko tkr tks tkt tnb tnc tnh tnk tnn tno tnr tns tnt to- tob toc toh tok ton too tor tos tot tou trb trc trh trk trn tro trr trs trt tru tsb tsc tsh tsk tsn tso tsr tss tst tsu ttb ttc tth ttk ttn tto ttr tts ttt ttu tub tuc tuh tuk tun tuo tur tus tut tuu ubb ubc ubh ubk ubn ubo ubr ubs ubt ubu ucb ucc uch uck ucn uco ucr ucs uct ucu uhb uhc uhh uho uhr uhs uht uhu ukb ukc ukk ukn ukr uku un- unb unc unh 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 ush usk usn uso usr uss ust usu utb utc uth utk utn uto utr uts utt utu uuc uun uur uus uut uuu