#include <stdio.h>
void echange(int* a,int* b) {
int temp=*a;
*a=*b;*b=temp;
printf("%d,%d\n",*a,*b);
}
int main() {
int a,b;
scanf("%d\n%d",&a,&b);
echange(&a,&b);
printf("%d,%d",a,b);
}
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