-th bbb bbc bbh bbk bbn bbo bbr bbs bbt bcb bcc bch bck bcn bco bcr bcs bct bhb bhc bhh bhk bho bhr bhs bht bkb bkc bkk bkn bko bkr bks bkt bnb bnc bnk bnn bno bnr bns bnt bob boc boh bok bon boo bor bos bot brb brh brk brn bro brr brs brt bsb bsc bsh bsk bsn bso bsr bss bst btb btc bth btk btn bto btr bts btt c-- cbb cbc cbh cbk cbn cbo cbr cbs cbt ccb ccc cch cck ccn cco ccr ccs cct ch- chb chc chh chk chn cho chr chs cht ckb ckc ckh cko cks ckt cn- cnb cnc cnh cnn cno cnr cns cnt co- cob coc coh cok con coo cor cos cot crb crc crh crk crn cro crr crs crt csb csc csh csk csn cso csr css cst ctb ctc cth ctk ctn cto ctr cts ctt hbb hbc hbh hbk hbn hbo hbr hbs hbt hcb hcc hch hck hcn hco hcr hcs hct hhb hhc hhh hhk hhn hho hhr hhs hht hkb hkh hkk hkn hko hkr hks hkt hnb hnc hnh hnk hnn hno hns hnt hob hoc hoh hok hon hoo hor hos hot hr- hrb hrc hrh hrk hrn hro hrr hrs hrt hsb hsc hsh hsk hsn hsr hss hst htb htc hth htk htn hto htr hts htt k-t kbb kbc kbh kbk kbn kbo kbr kbs kcb kcc kch kck kcn kcr kcs kct khh khk khn kho khr khs kkb kkc kkh kkk kkn kkr kks kkt kn- knc knk knn kno knr knt kob koc koh kok kon koo kor kos kot krc krk krn kro krr krs krt ksb ksc ksh ksk ksn kso ksr kss kst ktb ktc kth ktk ktn kto ktr kts ktt nbb nbc nbk nbn nbo nbr nbs nbt ncb ncc nch nck ncn nco ncr ncs nct nhb nhc nhh nhk nhn nhr nhs nht nkc nkk nkn nko nkr nks nkt nnb nnc nnh nnk nnn nno nns nnt no- nob noc noh nok non noo nor nos not nrb nrc nrk nrn nro nrr nrs nrt nsb nsc nsh nsk nsn nso nsr nss nst ntb ntc nth ntk ntn nto ntr nts ntt ob- obb obc obh obk obn obo obr obs obt oc- ocb occ och ock ocn oco ocr ocs oct ohc ohh ohn oho ohr ohs oht okb okc okk oko okr oks on- onb onc onh onk onn ono onr ons ont oo- oob ooc ooh ook oon ooo oor oos oot or- orb orc orh ork orn oro orr ors ort os- osb osc osh osk osn oso osr oss ost ot- otb otc oth otk otn oto otr ots ott rbb rbc rbh rbk rbn rbo rbr rbs rbt rcb rcc rch rcn rco rcr rcs rct rh- rhb rhc rhh rhn rho rhr rhs rht rkb rkc rkk rko rks rkt rnb rnc rnh rnn rno rnr rns rnt rob roc roh rok ron roo ror ros rot rrb rrc rrh rrk rrn rrr rrs rrt rsb rsc rsh rsk rsn rso rsr rss rst rtb rtc rtk rtn rto rtr rts rtt sbb sbc sbh sbk sbn sbo sbr sbs sbt scb scc sch sck scn sco scr scs sct sh- shb shc shh shk shn sho shr shs sht sk- skb skc skh skk sko skr sks skt snb snc snk snn sno snr sns snt sob soc soh sok son soo sor sos sot sr- srb src srh srk srn sro srr srs srt ss- ssb ssc ssh ssk ssn sso ssr sss sst stb stc sth stk stn sto str sts stt tbb tbc tbh tbk tbn tbo tbr tbs tbt tcb tcc tch tck tcn tco tcr tcs tct th- thb thc thh thk thn tho thr ths tht 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 trb trc trh trk trn tro trr trs trt tsb tsc tsh tsk tsn tso tsr tss tst ttb ttc tth ttk ttn tto ttr tts ttt