#include <stdio.h>

int main() {
	int l, w, h, a, b, c, total = 0;
	while (scanf("%dx%dx%d", &a, &b, &c) == 3) {
		l = a, w = b, h = c;
		if (l < w) w = l, l = b;
		if (w < h) {
			h = w, w = c;
			if (l < w) w = l, l = c;
		}
		total += 2*(w+h) + l*w*h;
	}
	printf("%d\n", total);
	return 0;
}