/* template.cpp [[[ */
#include <bits/stdc++.h>
using namespace std;
#define get_macro(a, b, c, d, name, ...) name
#define rep(...) get_macro(__VA_ARGS__, rep4, rep3, rep2, rep1)(__VA_ARGS__)
#define rrep(...) get_macro(__VA_ARGS__, rrep4, rrep3, rrep2, rrep1)(__VA_ARGS__)
#define rep1(n) rep2(i_, n)
#define rep2(i, n) rep3(i, 0, n)
#define rep3(i, a, b) rep4(i, a, b, 1)
#define rep4(i, a, b, s) for (ll i = (a); i < (ll)(b); i += (ll)s)
#define rrep1(n) rrep2(i_, n)
#define rrep2(i, n) rrep3(i, 0, n)
#define rrep3(i, a, b) rrep4(i, a, b, 1)
#define rrep4(i, a, b, s) for (ll i = (ll)(b) - 1; i >= (ll)(a); i -= (ll)s)
#define each(x, c) for (auto &&x : c)
#define fs first
#define sc second
#define all(c) begin(c), end(c)
using ui = unsigned;
using ll = long long;
using ul = unsigned long long;
using ld = long double;
const int inf = 1e9 + 10;
const ll inf_ll = 1e18 + 10;
const ll mod = 1e9 + 7;
const ll mod9 = 1e9 + 9;
const int dx[]{-1, 0, 1, 0, -1, 1, 1, -1};
const int dy[]{0, -1, 0, 1, -1, -1, 1, 1};
template<class T, class U> void chmin(T &x, const U &y){ x = min<T>(x, y); }
template<class T, class U> void chmax(T &x, const U &y){ x = max<T>(x, y); }
struct prepare_ { prepare_(){ cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(12); } } prepare__;
ll in(){ ll x; cin >> x; return x; }
vector<ll> in(size_t n){ vector<ll> v(n); each(x, v) cin >> x; return v; }
/* ]]] */

int n, m;
string s[50];

pair<int, int> dfs(int x, int y){
  if (x < 0 || n <= x) return {0, 0};
  if (y < 0 || m <= y) return {0, 0};
  if (s[x][y] == '.') return {0, 0};
  pair<int, int> res;
  if (s[x][y] == 'w') res = {1, 0};
  if (s[x][y] == 'b') res = {0, 1};
  s[x][y] = '.';
  rep(i, 4){
    auto t = dfs(x + dx[i], y + dy[i]);
    res.fs += t.fs;
    res.sc += t.sc;
  }
  return res;
}

int main(){
  cin >> n >> m;
  rep(i, n) cin >> s[i];
  int res = 0;
  int a[2]{};
  rep(i, n) rep(j, m){
    auto s = dfs(i, j);
    int t = min(s.fs, s.sc);
    res += t * 100;
    a[0] += s.fs - t;
    a[1] += s.sc - t;
  }
  int t = min(a[0], a[1]);
  res += t * 10;
  a[0] -= t;
  a[1] -= t;
  res += a[0] + a[1];
  cout << res << endl;
}