asd

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class p2
{
    public static void main(String[] args) throws IOException
    {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String input = reader.readLine();
        while(input!=null)
        {
            System.out.println("The input is: "+input);
            input = reader.readLine;
        }
    }

    interface Eval_Postfix_Expr
    {
        public ExpressionTree build_expression_tree(String input);
        public String[] evaluate_expression_tree(ExpressionTree tree);
    }

    public class Eval_Postfix_Expr_Implementation implements Eval_Postfix_Expr
    {
        String[] input;

        Eval_Postfix_Expr_Implementation(String str){
            input = str.split(" ");
        }

        @Override
        public ExpressionTree build_expression_tree(String input) {
            return new ExpressionTree(input, input.length());
        }

        @Override
        public String[] evaluate_expression_tree(ExpressionTree tree) {
            return new String[0];
        }

    }

    public class Node
    {
        String value;
        Node right;
        Node left;

        Node(String val){
            value = val;
            right = null;
            left  = null;
        }

        Node(){
            value = null;
        }
    }

    public class ExpressionTree
    {
        Node root;

        ExpressionTree(){
            root = new Node();
        }

        ExpressionTree(String value, int str_length){

        }
    }
}