#include <stdio.h>
 
    void foo(int[][3]);
 
    int main(void)
    {
       int a[3][3] = { {1, 2, 3}, {4, 5, 6}, {7, 8, 9} };
 
       foo(a);
 
       return 0;
    }
 
    void foo(int b[][3])
    {
       b++;
       b[2][1] = 9;
    }
 
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