bbb bbh bbm bbo bbr bbs bhb bhh bhm bho bhr bhs bmb bmh bmm bmo bmr bms bob boh bom boo bor bos brb brh brm bro brr brs bsb bsh bsm bso bsr bss hbb hbh hbm hbo hbr hbs hhb hhh hhm hho hhr hhs hmb hmh hmm hmo hmr hms hob hoh hom hoo hor hos hr- hrb hrh hrm hro hrr hrs hsb hsh hsm hsr hss m-o m-r mbb mbh mbm mbo mbr mbs mhh mhm mho mhr mhs mmb mmh mmm mmo mmr mms mob moh mom moo mor mos mrb mrh mrm mro mrr mrs msb msh msm mso msr mss ob- obb obh obm obo obr obs ohh ohm oho ohr ohs om- omb omh omm omo omr oms oo- oob ooh oom ooo oor oos or- orb orh orm oro orr ors os- osb osh osm oso osr oss rbb rbh rbm rbo rbr rbs rh- rhb rhh rhm rho rhr rhs rmb rmh rmm rmo rmr rms rob roh rom roo ror ros rrb rrh rrm rrr rrs rsb rsh rsm rso rsr rss sbb sbh sbm sbo sbr sbs sh- shb shh shm sho shr shs smb smh smm smo smr sms sob soh som soo sor sos sr- srb srh srm sro srr srs ss- ssb ssh ssm sso ssr sss