private int a(String[] choices, int i) {
		int count = 0;
		int max = 0;
		if (choices.length - 1 == i) {
			return 1;
		}
		for (int j = 0; j < choices[i].length(); j++) {

			if (choices[i].charAt(j) == 'Y') {
				count += a(choices, j);
			}
		}
		return count;
	}