import java.io.PrintStream;
public class SkrivRad {
    private int radnummer;
    private String id;
    private PrintStream strom;

    public SkrivRad() {
	this("");
    }
    
    public SkrivRad(String id) {
	this(id, System.out);
    }

    public SkrivRad(String id, PrintStream strom) {
	this.id = id;
	this.strom = strom;
	this.radnummer = 0;
    }
    
    public void skrivRad(String s) {
	radnummer += 1;
	if (id.equals("")) {
	    strom.println(radnummer + ": " + s);
	} else {
	    strom.println(id + " " + radnummer + ": " + s);
	}
    }
}