-th bbb bbc bbh bbm bbn bbo bbs bbt bcb bcc bch bcm bcn bco bcs bct bhb bhc bhh bhm bho bhs bht bmb bmc bmh bmm bmn bmo bms bmt bnb bnc bnn bno bns bnt bob boc boh bom bon boo bos bot bsb bsc bsh bsm bsn bso bss bst btb btc bth btm btn bto bts btt c-- cbb cbc cbh cbm cbn cbo cbs cbt ccb ccc cch ccm ccn cco ccs cct ch- chb chc chh chm chn cho chs cht cmb cmc cmh cmm cmn cmo cms cmt cn- cnb cnc cnh cnm cnn cno cns cnt co- cob coc coh com con coo cos cot csb csc csh csm csn cso css cst ctb ctc cth ctm ctn cto cts ctt hbb hbc hbh hbm hbn hbo hbs hbt hcb hcc hch hcm hcn hco hcs hct hhb hhc hhh hhm hhn hho hhs hht hmb hmc hmh hmm hmo hms hmt hnb hnc hnh hnn hno hns hnt hob hoc hoh hom hon hoo hos hot hsb hsc hsh hsm hsn hss hst htb htc hth htm htn hto hts htt m-o mbb mbc mbh mbm mbo mbs mbt mc- mcb mcc mch mcm mcn mco mcs mct mhc mhh mhm mhn mho mhs mht mmb mmc mmh mmm mmn mmo mms mmt mnb mnc mnm mnn mno mns mnt mob moc moh mom mon moo mos mot msb msc msh msm msn mso mss mst mtb mtc mth mtm mtn mto mts mtt nbb nbc nbm nbn nbo nbs nbt ncb ncc nch ncm ncn nco ncs nct nhb nhc nhh nhm nhn nhs nht nmb nmc nmh nmm nmn nmo nms nmt nnb nnc nnh nnm nnn nno nns nnt no- nob noc noh nom non noo nos not nsb nsc nsh nsm nsn nso nss nst ntb ntc nth ntm ntn nto nts ntt ob- obb obc obh obm obn obo obs obt oc- ocb occ och ocm ocn oco ocs oct ohc ohh ohm ohn oho ohs oht om- omb omc omh omm omn omo oms omt on- onb onc onh onn ono ons ont oo- oob ooc ooh oom oon ooo oos oot os- osb osc osh osm osn oso oss ost ot- otb otc oth otm otn oto ots ott sbb sbc sbh sbm sbn sbo sbs sbt scb scc sch scm scn sco scs sct sh- shb shc shh shm shn sho shs sht smb smc smh smm smn smo sms smt snb snc snm snn sno sns snt sob soc soh som son soo sos sot ss- ssb ssc ssh ssm ssn sso sss sst stb stc sth stm stn sto sts stt tbb tbc tbh tbm tbn tbo tbs tbt tcb tcc tch tcm tcn tco tcs tct th- thb thc thh thm thn tho ths tht tmb tmc tmh tmm tmn tmo tms tmt tnb tnc tnh tnm tnn tno tns tnt to- tob toc toh tom ton too tos tot tsb tsc tsh tsm tsn tso tss tst ttb ttc tth ttm ttn tto tts ttt