import java.util.*;
import java.lang.*;

class Main
{
	public static void main (String[] args)
	{
        System.out.println("Start.");
		try{
            try{
                int n = 2/0;
            }catch(Exception e){
                System.out.println("e thrown "+e.getMessage());
            }
		}catch(Exception ex){
    	     System.out.println("ex thrown "+ex.getMessage());
		}
        System.out.println("Done.");
	}
}