#include<stdio.h>
#include<ctype.h>
#include<math.h>
#include<malloc.h>
int main()
{

unsigned int x=5,y=7;
printf("%d,  %d\n",x,y);
x=x^y;
y=y^x;
x=x^y;
printf("%d,  %d",x,y);
return(0);
}