-th bbb bbc bbh bbm bbo bbs bbt bcb bcc bch bcm bco bcs bct bhb bhc bhh bhm bho bhs bht bmb bmc bmh bmm bmo bms bmt bob boc boh bom boo bos bot bsb bsc bsh bsm bso bss bst btb btc bth btm bto bts btt c-- cbb cbc cbh cbm cbo cbs cbt ccb ccc cch ccm cco ccs cct ch- chb chc chh chm cho chs cht cmb cmc cmh cmm cmo cms cmt co- cob coc coh com coo cos cot csb csc csh csm cso css cst ctb ctc cth ctm cto cts ctt hbb hbc hbh hbm hbo hbs hbt hcb hcc hch hcm hco hcs hct hhb hhc hhh hhm hho hhs hht hmb hmc hmh hmm hmo hms hmt hob hoc hoh hom hoo hos hot hsb hsc hsh hsm hss hst htb htc hth htm hto hts htt m-o mbb mbc mbh mbm mbo mbs mbt mc- mcb mcc mch mcm mco mcs mct mhc mhh mhm mho mhs mht mmb mmc mmh mmm mmo mms mmt mob moc moh mom moo mos mot msb msc msh msm mso mss mst mtb mtc mth mtm mto mts mtt ob- obb obc obh obm obo obs obt oc- ocb occ och ocm oco ocs oct ohc ohh ohm oho ohs oht om- omb omc omh omm omo oms omt oo- oob ooc ooh oom ooo oos oot os- osb osc osh osm oso oss ost ot- otb otc oth otm oto ots ott sbb sbc sbh sbm sbo sbs sbt scb scc sch scm sco scs sct sh- shb shc shh shm sho shs sht smb smc smh smm smo sms smt sob soc soh som soo sos sot ss- ssb ssc ssh ssm sso sss sst stb stc sth stm sto sts stt tbb tbc tbh tbm tbo tbs tbt tcb tcc tch tcm tco tcs tct th- thb thc thh thm tho ths tht tmb tmc tmh tmm tmo tms tmt to- tob toc toh tom too tos tot tsb tsc tsh tsm tso tss tst ttb ttc tth ttm tto tts ttt