bbb bbc bbn bbo bcb bcc bcj bcn bco bjc bjj bjn bnb bnc bnj bnn bno bob boc boj bon boo c-- c-j cbb cbc cbj cbn cbo ccb ccc ccj ccn cco cjb cjc cn- cnb cnc cnj cnn cno co- cob coc coj con coo jbc jbj jbo jcb jcc jco jjb jjc jjj jnc jnj jnn jno job joc joj jon joo nbb nbc nbn nbo ncb ncc ncn nco njc njn nnb nnc nnn nno no- nob noc noj non noo ob- obb obc obj obn obo oc- ocb occ ocj ocn oco ojb ojc ojo on- onb onc onj onn ono oo- oob ooc oon ooo