  f      f      f    .
       c    a        .
   DDFDDD DIIIIDDDF  .
     F            F  .
     F    b       F  .
   EEEEEEEII      F  .
   c        c     F  .
 IBFBIB  ICCFCI   F  .
   F        F     F  .
*  F   d    F  e  F  .
AAAAAAAAAAAAAAAAAAAA .





