lines = [i.rstrip() for i in open("input").readlines()]

class Box:
    def __init__(self, string):
        inter = string.split("x")
        self.a = int(inter[0])
        self.b = int(inter[1])
        self.c = int(inter[2])

    def surfacearea(self):
        a_0 = self.a * self.b
        a_1 = self.b * self.c
        a_2 = self.c * self.a

        slack = min(a_0, a_1, a_2)
        print(slack)

        return 2 * a_0 + 2 * a_1 + 2 * a_2 + slack

    def bow(self):
        arr = [self.a, self.b, self.c]
        arr.sort()

        tot = 0
        tot += 2*arr[0] + 2*arr[1]
        tot += self.a * self.b * self.c

        return tot

boxes = []
for i in lines:
    boxes.append(Box(i))

s = 0
for i in boxes:
    s += i.bow()

print(s)