import tester.*;

interface IAnimal {
}

class Snake implements IAnimal {
	String name;
	int weight;
	String food;
	Snake(String name, int weight, String food) {
		this.name = name;
		this.weight = weight;
		this.food = food;
	}
	
}

class Dillo implements IAnimal {
	double weight;
	boolean isAlive;
	Dillo(double weight, boolean isAlive) {
		this.weight = weight;
		this.isAlive = isAlive;
	}
}

class Posn {
	double x;
	double y;
	Posn(double x, double y) {
		this.x = x;
		this.y = y;
	}
}

class Ant implements IAnimal {
	double weight;
	Posn location;
	Ant(double weight, Posn location) {
		this.weight = weight;
		this.location = location;
	}
}

interface IGrade {
}

class NoGrade implements IGrade {
	NoGrade() { }
}

class NumGrade implements IGrade {
	int n;
	NumGrade(int n) {
		this.n = n;
	}
}

class Examples{
  	Snake slinky = new Snake("Sinky", 12, "rats");
  	Dillo dillo1 = new Dillo(7, true);
  	Dillo dillo2 = new Dillo(2, false);
  	Ant ant1 = new Ant(0.001, new Posn(5, 2));
  	Posn home = new Posn(0, 0);
  	Ant ant2 = new Ant(0.0005, home);
  	IAnimal suzy = new Snake("Suzy", 8, "bananas");
  	IGrade notTaken = new NoGrade();
  	IGrade barelyPassed = new NumGrade(75);
}