bbb bbd bbm bbo bbs bdb bdd bdm bdo bds bmb bmd bmm bmo bms bob bod bom boo bos bsb bsd bsm bso bss dbb dbd dbm dbo dbs ddb ddd ddm ddo dds dmb dmd dmm dmo dms dob dod dom doo dos dsb dsd dsm dso dss m-o mbb mbd mbm mbo mbs mdb mdd mdm mdo mds mmb mmd mmm mmo mms mob mod mom moo mos msb msd msm mso mss ob- obb obd obm obo obs odb odd odm odo ods om- omb omd omm omo oms oo- oob ood oom ooo oos os- osb osd osm oso oss sbb sbd sbm sbo sbs sdb sdd sdm sdo sds smb smd smm smo sms sob sod som soo sos ss- ssb ssd ssm sso sss