public static String calculateLevelRatio(Deck deck) {
		int zero = 0;
		int one = 0;
		int two = 0;
		int three = 0;
		for (Card c: deck) {
			if (c.getLevel()  == 0) 
				zero++;
			if (c.getLevel() == 1)
				one++;
			if (c.getLevel() == 2)
				two++;
			if (c.getLevel() == 3)
				three++;
		}
		String str = "Level Stats:"
				+ "\nLevel 0: " + zero
				+  "\nLevel 1: " + one
				+ "\nLevel 2: " + two
				+ "\nLevel 3: " + three;
		
		return str;
	}