Consider the following function:

void incr(char** ptr)
{
  ++ptr;
}

and the following code excerpt (i.e a part of a code that is elsewhere correct),

  char msg[]  = "CS-202";
  char* tab[] = { msg + 1, msg + 3 };
  char* p     = msg + sizeof(msg) - 1;
  char** u = tab;
  char** v = &p;
  incr(u);
  // add one statement on u
  
  // add one statement on v
  
  for (char* r = *u; r < *v; ++r) putchar(*r);

What should be added (one instruction for u and one instruction for v) so that the above code prints "20"?