bbb bbc bbd bbm bbo bbs bcb bcc bcd bcm bco bcs bdb bdc bdd bdm bdo bds bmb bmc bmd bmm bmo bms bob boc bod bom boo bos bsb bsc bsd bsm bso bss c-- cbb cbc cbd cbm cbo cbs ccb ccc ccd ccm cco ccs cdb cdc cdd cdm cdo cds cmb cmc cmd cmm cmo cms co- cob coc cod com coo cos csb csc csd csm cso css dbb dbc dbd dbm dbo dbs dcb dcc dcd dcm dco dcs ddb ddc ddd ddm ddo dds dmb dmc dmd dmm dmo dms dob doc dod dom doo dos dsb dsc dsd dsm dso dss m-o mbb mbc mbd mbm mbo mbs mc- mcb mcc mcd mcm mco mcs mdb mdc mdd mdm mdo mds mmb mmc mmd mmm mmo mms mob moc mod mom moo mos msb msc msd msm mso mss ob- obb obc obd obm obo obs oc- ocb occ ocd ocm oco ocs odb odc odd odm odo ods om- omb omc omd omm omo oms oo- oob ooc ood oom ooo oos os- osb osc osd osm oso oss sbb sbc sbd sbm sbo sbs scb scc scd scm sco scs sdb sdc sdd sdm sdo sds smb smc smd smm smo sms sob soc sod som soo sos ss- ssb ssc ssd ssm sso sss