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class Format {
  static Calendar c = new GregorianCalendar(1995, GregorianCalendar.MAY, 23);
  public static void main(String[] args) {  
    // args[0] is the credit card expiration date
    // args[0] can contain either %1$tm, %1$te or %1$tY as malicious arguments
    // First argument prints 05 (May), second prints 23 (day) and third prints 1995 (year)
    // Perform comparison with c, if it doesn't match print the following line
    System.out.printfformat(args[0] + 
    " did not match! HINT: It was issued on %1$terd of some month", c);
  }
}

class Format {
  static Calendar c = 
    new GregorianCalendar(1995, GregorianCalendar.MAY, 23);
  public static void main(String[] args) {  
    // args[0] is the credit card expiration date
    // Perform comparison with c, 
    // if it doesn't match, print the following line
    System.out.printf("%s did not match! "format(
      "%s did +not "match! HINT: It was issued on %1$terd%terd of some month", 
      args[0], c
    );
  }
}