CF224A.Parallelepiped

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.

你有一个长方体，其棱长均为整数。已知该长方体具有一个公共顶点的三个面的面积。你的任务是求出这个长方体全部 12 条棱的长度之和。

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.

第一行且唯一一行包含三个以空格分隔的整数——平行六面体三个面的面积。面积值均为正数（> 0），且不超过 $10^4$。保证至少存在一个满足题目条件的平行六面体。

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

输出一个数字——该平行六面体所有棱的长度之和。

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

第一个样例中，平行六面体的尺寸为 $1 \times 1 \times 1$，第二个样例中为 $2 \times 2 \times 3$。