A. Parallelepiped
time limit per test
2 seconds
memory limit per test
256 megabytes
input
standard input
output
standard output

You've got a rectangular parallelepiped with integer edge lengths. You know the areas of its three faces that have a common vertex. Your task is to find the sum of lengths of all 12 edges of this parallelepiped.

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.

Examples
Input
1 1 1
Output
12
Input
4 6 6
Output
28
Note

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