//Sample21_01.java
import java.io.Console;

public class Sample21_01 {

  public static void main(String[] args) {
		  Console cons = System.console();
		  String str = null;
		  if (cons != null) {
		  	str = cons.readLine("input: ");
		  }
      System.out.println("echo : " + str);
  }
}