#define B(x) "hello" ## #x

#define C(x,y) #x ## #y

#define STR "hello"

#define D(x) #x ## STR

#define E(x) STR ## #x

#define G(x) x ## STR

#define H(x) STR ## x

#define I(x) "hello" ## #x ## "goodbye"

#define J(x, y) "Hello" ## #x ## #y ## "Goodbye"

#define K(x) "Hello ## #x"

#define L(x, y) x ## y

#define PAREN_STR(a) "(" ## a ## ")"

#define CONCAT(a, b) a ## b

#define CONCAT_STR(a, b) #a ## #b

#define DEBUG_PRINT(a) "value of " ## #a ## " = <<a>>"

A: A(asdf);

B: B(jklm);

C: C(abc, def);

D: D(xyz);

E: E(ghi);

G: G(abc);

H: H(def);

I: I(mnop);

J: J(Tuv, Wxy);

K: K(asfd);

L: L("hello", "goodbye");

PAREN_STR("parens");

CONCAT("abc", "def");

CONCAT_STR(uvw, xyz);