bbb bbc bbm bbo bcb bcc bcj bcm bco bjc bjj bjm bmb bmc bmj bmm bmo bob boc boj bom boo c-- c-j cbb cbc cbj cbm cbo ccb ccc ccj ccm cco cjb cjc cmb cmc cmj cmm cmo co- cob coc coj com coo jbc jbj jbm jbo jcb jcc jcm jco jjb jjc jjj jmb jmc jmj jmm jmo job joc joj jom joo m-o mbb mbc mbj mbm mbo mc- mcb mcc mcm mco mjb mjc mjj mjm mmb mmc mmj mmm mmo mob moc mom moo ob- obb obc obj obm obo oc- ocb occ ocj ocm oco ojb ojc ojm ojo om- omb omc omj omm omo oo- oob ooc oom ooo