public int[] findstem(String ss) {
		int[] pos = new int[4];
		for (int i = 0; i < ss.length(); i++) {
			if (ss.charAt(i) == '(') {
				pos[0] = i;
				break;
			}
		}
		for (int i = pos[0]; i < ss.length(); i++)
			if (ss.charAt(i) == ')') {
				pos[2] = i;
				break;
			}
		for (int i = ss.length() - 1; i > 0; i--)
			if (ss.charAt(i) == ')') {
				pos[3] = i;
				break;
			}
		for (int i = pos[3]; i > 0; i--)
			if (ss.charAt(i) == '(') {
				pos[1] = i;
				break;
			}
		return (pos);
	}