public abstract class Cycle {
    public int numWheels;
    public int numGears;
    public String color;
    public String brand;

    public Cycle(String color, String brand) {
	numWheels = 2;
	numGears = 1;
	this.color = color;
	this.brand = brand;
    }

    public String toString() {
	return
	    "number of wheel: " + numWheels + "\n" +
	    "number of gears: " + numGears + "\n" +
	    "color: " + color + "\n" +
	    "brand: " + brand + "\n";
    }
}