public class Mammal
{
    private String name;
    private String sound;
    
    public Mammal()
    {
	name = "Mammal";
	sound = "silence";
    }
    
    public void setName(String name)
    {
	this.name = name;
    }
    
    public String getName()
    {
	return name;
    }
    
    public void setSound(String sound)
    {
	this.sound=sound;
    }
    
    public String getSound()
    {
	return sound;
    }
    
    public void speak()
    {
	System.out.print(sound);
    }
    
    public boolean laysEggs()
    {
	return false;
    }
    
    public boolean livesInWater()
    {
	return false;
    }
}