import java.util.Random;

public class TrickCipherDemo {
	
	public static void main(String[] args) {
		int max = 1000000000;
		Numbers n;
		if (args.length > 0) n = new RandomNumbers(max, args[0].hashCode());
		else n = new SequentialNumbers();
		TrickCipher tc = new TrickCipher(max, "this is a key".getBytes());
		for (int i = 0; i < 20; ++i) {
			int x = n.next();
			System.out.print(x);
			int c = tc.encrypt(x);
			System.out.print("\t");
			System.out.print(c);
			int p = tc.decrypt(c);
			System.out.print("\t");
			System.out.println(p);
		}
	}
	
}

interface Numbers {
	
	public int next();
	
}

class SequentialNumbers implements Numbers {
	
	private int i;
	
	public int next() {
		return i++;
	}
	
}

class RandomNumbers implements Numbers {
	
	Random rnd;
	private int max;
	
	public RandomNumbers(int max, long seed) {
		this.max = max;
		rnd = new Random();
	}
	
	public int next() {
		return rnd.nextInt(max);
	}
	
}