UI.java

import java.io.*;

public class UI {
  private PrintStream stream;

  public UI(PrintStream stream) {
    this.stream = stream;
  }
    InputStream input = System.in;
    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(input));

    public void setBufferedReader(BufferedReader bufferedReader) {
        this.bufferedReader = bufferedReader;
    }

    public String getNextMove() {
        String move = "";
        try {
            move = bufferedReader.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return move;
    }
}