-th bbb bbc bbh bbm bbo bbt bcb bcc bch bcm bco bct bhb bhc bhh bhm bho bht bmb bmc bmh bmm bmo bmt bob boc boh bom boo bot btb btc bth btm bto btt c-- cbb cbc cbh cbm cbo cbt ccb ccc cch ccm cco cct ch- chb chc chh chm cho cht cmb cmc cmh cmm cmo cmt co- cob coc coh com coo cot ctb ctc cth ctm cto ctt hbb hbc hbh hbm hbo hbt hcb hcc hch hcm hco hct hhb hhc hhh hhm hho hht hmb hmc hmh hmm hmo hmt hob hoc hoh hom hoo hot htb htc hth htm hto htt m-o mbb mbc mbh mbm mbo mbt mc- mcb mcc mch mcm mco mct mhc mhh mhm mho mht mmb mmc mmh mmm mmo mmt mob moc moh mom moo mot mtb mtc mth mtm mto mtt ob- obb obc obh obm obo obt oc- ocb occ och ocm oco oct ohc ohh ohm oho oht om- omb omc omh omm omo omt oo- oob ooc ooh oom ooo oot ot- otb otc oth otm oto ott tbb tbc tbh tbm tbo tbt tcb tcc tch tcm tco tct th- thb thc thh thm tho tht tmb tmc tmh tmm tmo tmt to- tob toc toh tom too tot ttb ttc tth ttm tto ttt