#define	S(x)	S0(x)
#define	S0(x)	#x
#define	T(x,y)\
S(x)\
S(y)
#define	T0(x,y)\
S0(x)\
S0(y)
#define	U(x)\
S(x)\
S(x)
#define	U0(x)\
S0(x)\
S0(x)
#define	V(x)\
V_(x)\
V_(x)
#define	V_(x)\
S(x)
#define	V0(x)\
V0_(x)\
V0_(x)
#define	V0_(x)\
S0(x)
__COUNTER__
S(__COUNTER__)
S0(__COUNTER__)
T(__COUNTER__,__COUNTER__)
T0(__COUNTER__,__COUNTER__)
U(__COUNTER__)
U0(__COUNTER__)
V(__COUNTER__)
V0(__COUNTER__)

.