#define Square(x)  (x)*(x)
#define One     1
#define Two     2
#define Three   3
#define Four    4
#define Five    5
#define Six     6
#define Seven   7
#define Eight   8
#define Nine    9
#define Ten    10
#define Eleven 11
#define Twelve 12

#if (Square(2+3)!=11)
  Square(Three + Seven)
#endif
