public static void main(String[] args) {
		// TODO Auto-generated method stub
		FourSum f = new FourSum();
		int[] arr = { 0, 0, 0, 0 };
		for (List<Integer> l : f.fourSum(arr, 0)) {
			for (int i : l) {
				System.out.print(i + " ");
			}
			System.out.println();
		}

	}