C black

C blackC blackC blackC black
C blackC blackC blackC blackC blackC blackC blackC black
C blackC blackC blackC blackC blackC blackC blackC blackC blackC blackC blackC black
C blackC blackC blackC blackC blackC blackC blackC blackC blackC blackC blackC blackC blackC blackC blackC black
C blackC blackC blackC blackC blackC blackC blackC black