/*???3??????????????
 * A??B??????C???????;B??A??????A??C???;C????B????B?A????
 * ????????????????????????????????3??????
 *????: 2012-10-17
 *??: ??
 */

int main()
{	if((((2 > 3) + (1 == 3)) == 0) && (((3 > 2) + (3 > 1)) == 3) && (((1 > 2) + (2 > 3)) == 2))
		cout << "CBA";   //?????????
	else if((((1 > 3) + (2 == 1)) == 0) && (((3 > 1) + (3 > 2)) == 2) && (((2 > 1) + (1 > 3)) == 1))
		cout << "BCA";
	else if((((3 > 2) + (3 == 2)) == 1) && (((2 > 3) + (2 > 1)) == 0) && (((1 > 3) + (3 > 2)) == 2))
		cout << "CAB";
	else if((((3 > 1) + (2 == 3)) == 2) && (((1 > 3) + (1 > 2)) == 0) && (((2 > 3) + (3 > 1)) == 1))
		cout << "ACB";
	else if((((1 > 2) + (3 == 2)) == 1) && (((2 > 1) + (2 > 3)) == 2) && (((3 > 1) + (1 > 2)) == 0))
		cout << "BAC";
	else
		cout << "ABC";
	return 0;
}
