#include<stdio.h>
int main()
{
    void swap(int *p1,int *p2);
    int a,b;
    int *pointer_1,*pointer_2;
    scanf("%d%d",&a,&b);
    pointer_1=&a;    pointer_2=&b;
    swap(pointer_1,pointer_2);
    printf("%d,%d\n",a,b);
    
 } 
 void swap(int *p1,int *p2)
 {
     int c;
      c=*p1;
     *p1=*p2;
    *p2=c;
     
 }