public class Quiz_4
{
   public static void main(String[] args)
   {
      String s;

      s = "12";
      s = s + '3';
      System.out.println(s);

      s = "12";
      s = s + (char)51;
      System.out.println(s);

      s = "12";
      s = s + 51;
      System.out.println(s);
   }
}