/*
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 * and open the template in the editor.
 */

/**
 *
 * @author ensia
 */
import java.util.ArrayList;
public class Stack {
    private ArrayList<String>stack;

    public boolean isEmpty(){
        if(stack.isEmpty()){
        return true;
        }
        return false;
    }

    public void add(String value){
        this.stack.add(value);
    }
    public ArrayList<String> values(){
       return this.stack;
    }

}