#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <utility>
#include <string>

using namespace std;

const int dx[4] = {1, 0, -1, 0};
const int dy[4] = {0, 1, 0, -1};

int n, m;
vector<string> choco;

bool change() {
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			char c1 = choco[i][j];
			if (c1 == '.') {
				continue;
			}
			for (int k = 0; k < 4; k++) {
				int ni = i + dy[k];
				int nj = j + dx[k];
				char c2 = choco[ni][nj];
				if (c2 != '.' && c1 != c2) {
					choco[i][j] = '.';
					choco[ni][nj] = '.';
					return true;
				}
			}
		}
	}
	return false;
}

int main() {
	string s;
	cin >> n >> m;

	choco.emplace_back(string(m+2, '.'));
	for (int i = 0; i < n; i++) {
		cin >> s;
		s = "." + s  + ".";
		choco.emplace_back(s);
	}
	choco.emplace_back(string(m+2, '.'));

	int score = 0;
	while (1) {
		bool update = change();
		if (update) {
			score += 100;
		} else {
			break;
		}
	}

	int nw = 0;
	int nb = 0;
	for (auto ccc : choco) {
		for (auto c : ccc) {
			if (c == 'b') {
				nb++;
			} else if (c == 'w') {
				nw++;
			}
		}
	}
	score += 10 * min(nw, nb) + abs(nw - nb);


	cout << score << endl;
	return 0;
}