#include <stdio.h>

void main(void)
 {
   printf("0 ^ 0 is %d\n", 0 ^ 0);
   printf("0 ^ 1 is %d\n", 0 ^ 1);
   printf("1 ^ 1 is %d\n", 1 ^ 1);
   printf("1 ^ 2 is %d\n", 1 ^ 2);
   printf("15 ^ 127 is %d\n", 15 ^ 127);
 }