public class Ladder
{
  protected int top;
  protected int bottom;

  public Ladder(int b, int t)
  {
    this.top = t;
    this.bottom = b;
  }

  public int getTop()
  {
    return this.top;
  }
 
  public int getBottom()
  {
    return this.bottom;
  }

  public String toString()
  {
    return "A ladder from " + this.bottom + " to " + this.top;
  }
}