class Nurse { 
    private String name;
    public Nurse(String name) { this.name = name; }
    public String toString() { return "Nurse: "+name; }
}

// nurses on a hospital floor swap supervising duties
public class nurses {
    public static void main(String[] args) {

	Nurse supervisor, a, b, c;
	supervisor = null; // like setting "zero"
	a = new Nurse("A"); 
	b = new Nurse("B");
	c = new Nurse("C");
	
	switch((int)(Math.random()*4)+1) {
	case 1:
	    supervisor = a;
	    break;
	case 2:
	    supervisor = b;
	    break;
	case 3:
	    supervisor = c;
	    break;
	default:
	    System.out.println("Something wrong!");
	    break;
	}

	System.out.println(supervisor);

    }
}