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#include <stdio.h>
#include <stdlib.h>


char *modi(char *dest)
{

  dest[0] = 'A';
  dest[1] = '\0';
  return dest;

}


int main () {

        char *a;
        
        a=malloc(10);

        printf("%s\n", a);

        modi(a);

        printf("%s\n", a);

        return 0;
}