class D
{
    public static void main(String[] args){
    String str="heavy";
    
    try
    {
        int a=Integer.parseInt(str);
        System.out.println("error not found");
    }
   catch(NumberFormatException n)
   {
       System.out.println("error found");
   }
   System.out.println("system ended ");
} 
}