import java.util.*;

import java.io.*;

public class PrintSumMain 
{
    	public static void main (String args [ ]) throws IOException
    	{
		printSum ("50 30");	
    	} // method main

	/**
         *  Prints the sum of the two int values in a specified String object.
	 *
	 *  @param s - the String object that consists of two int values.
	 *	 
         */
	public static void printSum (String s)
   	{
       	try
       	{
           	StringTokenizer st = new StringTokenizer (s);
           	int first = Integer.parseInt (st.nextToken ( ));
       		int second = Integer.parseInt (st.nextToken ( ));
       		System.out.println ("The sum of " + first + " and " +
                               		second + " is " + (first + second));
       	} // try
        catch (NullPointerException e1)
       	{
       		System.out.println (e1 + " because s is null");
       	} // catch
        catch (NumberFormatException e2)
       	{
       		System.out.println (e2 + " is not an integer");
       	} // catch
       	catch (NoSuchElementException e3)
       	{
            	System.out.println (e3 + " because there must be two ints");
       	} // catch
       	System.out.println ("...continuing with the rest of the program");
   } // method printSum

} // class PrintSumMain