int a;
static int b;
static int c;
extern int d;

void second()
{
  printf("second:\t");
  printf("&a is %u, ",(unsigned int) &a);
  printf("&b is %u, ",(unsigned int) &b);
  printf("&c is %u, ",(unsigned int) &c);
  printf("&d is %u\n",(unsigned int) &d);
  a = '5';
  b = '6';
  c = '7';
  d = '8';
}

int main(void)
{
  first();
  second();
  third();
  putchar(a);
  putchar(b);
  putchar(c);
  putchar(d);
  putchar('\n');
  return 0;
}