#include <stdio.h>

int main(void)
{
   int a, b, *p1, *p2;
   a = 30;
   b = 50;
   p1 = &a;
   p2 = &b;

   printf("%d %d %d %d %d %d\n", a, b, *p1, *p2, p1, p2);

   p1 = &35;

   p1 = *35;

   p1 = 35;

   a = &b;

   a = *b;

   *a = *p1;

   &p1 = p2;

   a = p2;

   a = **p2;

   p1 = b;

   p1 = &p2;

   p1 = *p2;

   a = *b;

   *p1 = p2;

   *p1 = &a;

   return 0;
}