import DataStructures.*;
import java.io.*;

public class ReverseString {

    static String reverse(String str) {
        String revstr = "";
        Stack s = new StackArray();
        // Stack s = new StackList();
        ... code goes here
    }
    
    public static void main(String[] args) {
        try {
            BufferedReader in =
                new BufferedReader(new InputStreamReader(System.in));
            System.out.print("Enter string: ");
            System.out.println("Reverse: " + reverse(in.readLine()));
        } catch (IOException e) {
            System.out.println(e);
        }
    }
}