public static List<Long> cubeSum(int n, List<String> operations) {
        long[][][] a = new long[n][n][n];
        
        List<Long> res = new ArrayList<>();
        for(String s: operations) {
            String[] v = s.split(" ");
            if(s.contains("UPDATE")) {
                a[Integer.valueOf(v[1]) - 1][Integer.valueOf(v[2]) - 1][Integer.valueOf(v[3]) - 1] = Long.valueOf(v[4]);
            } else {
                int x1 = Integer.valueOf(v[1]) - 1;
                int y1 = Integer.valueOf(v[2]) - 1;
                int z1 = Integer.valueOf(v[3]) - 1;
                int x2 = Integer.valueOf(v[4]) - 1;
                int y2 = Integer.valueOf(v[5]) - 1;
                int z2 = Integer.valueOf(v[6]) - 1;
                long sum = 0;
                for (int i = x1; i <= x2; i++) {
                    for (int j = y1; j <= y2; j++) {
                        for (int k = z1; k <= z2; k++) {
                            sum += a[i][j][k];
                        }
                    }
                }
                res.add(sum);
            }
        }
        return res;

    }