#include <fstream.hfa>
#include <enum.hfa>

int main() {
	enum(int) E { BBB, AAA, AA, AB, B, CB, AC };
	E e;

	for () {
		try {
			sin | e;
		} catch( missing_data * ) {
			sout | "missing data";
			continue;									// try again
		} // try
	  if ( eof( sin ) ) break;
		sout | "\"" | e | "\"";
	} // for
}