X                  X
X                  X
X                  X
X                  X
X  DDDDDD  DDDDDD  X
X  DDDDD    DDDDD  X
X  DDD        DDD  X
X  DDD        DDD  X
X  DD          DD  X
X  D            D  X
X  D            D  X
X  DD          DD  X
X  DDD        DDD  X
X  DDD        DDD  X
X  DDDDD    DDDDD  X
X  DDDDDD  DDDDDD  X
X                  X
X                  X
X                  X
X                  X
