#include <stdio.h>
 
int main(void)
{
    int a, b, *p, *q;
 
    p = &a;
    q = &b;
    a = 1;
    *q = 3;
    b = *q;
 
    printf("%d, %d, %d, %d\n", a
, b
, *p
, *q
);     return 0;
}
 
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