Parallelepiped

Description:

Input:

The first and the single line contains three space-separated integers — the areas of the parallelepiped's faces. The area's values are positive ( > 0) and do not exceed 10⁴. It is guaranteed that there exists at least one parallelepiped that satisfies the problem statement.

Output:

Print a single number — the sum of all edges of the parallelepiped.

Sample Input:

1 1 1

Sample Output:

12

Sample Input:

4 6 6

Sample Output:

28

Note:

In the first sample the parallelepiped has sizes 1 × 1 × 1, in the second one — 2 × 2 × 3.