+ | I  F  D  B  C  S  O 
---+---------------------
 I | I  F  D  *  I  S  * 
 F | F  F  D  *  F  S  * 
 D | D  D  D  *  D  S  * 
 B | *  *  *  *  *  S  * 
 C | I  F  D  *  I  S  * 
 S | S  S  S  S  S  S  S 
 O | *  *  *  *  *  S  *