#include <bits/stdc++.h>

char field[64][64];
int h, w;
int dr[4] = {1, 0, -1, 0};
int dc[4] = {0, 1, 0, -1};
bool outOfRange(int r, int c) {
  if( not ( 0 <= r and r < h and 0 <= c and c < w ) ) return true;
  return false;
}

int main() {
  scanf("%d %d", &h, &w);
  for(int i = 0; i < h; ++i) {
    scanf("%s", field[i]);
  }

  int res = 0;
  bool updated = false;
  do {
    updated = false;
    for(int r = 0; r < h; ++r) {
      for(int c = 0; c < w; ++c) {
        if( field[r][c] == '.' ) continue;
        int count = 0;
        int kk = -1;
        for(int k = 0; k < 4; ++k) {
          int nr = r + dr[k], nc = c + dc[k];
          if( outOfRange(nr, nc) ) continue;
          if( field[nr][nc] == '.' ) continue;
          count += 1;
          kk = k;
        }
        if( count == 1 ) {
          field[r][c] = field[r+dr[kk]][c+dc[kk]] = '.';
          res += 100;
          updated = true;
        }
      }
    }
    if( not updated ) {
      for(int r = 0; r < h; ++r) {
        for(int c = 0; c < w; ++c) {
          if( field[r][c] == '.' ) continue;
          int count = 0;
          int kk = -1;
          for(int k = 0; k < 4; ++k) {
            int nr = r + dr[k], nc = c + dc[k];
            if( outOfRange(nr, nc) ) continue;
            if( field[nr][nc] == '.' ) continue;
            count += 1;
            kk = k;
          }
          if( count == 2 ) {
            field[r][c] = field[r+dr[kk]][c+dc[kk]] = '.';
            res += 100;
            updated = true;
            goto label_1;
          }
        }
      }
    label_1:;
    }
  } while( updated );
         
  int w_count = 0, b_count = 0;
  for(int r = 0; r < h; ++r) {
    for(int c = 0; c < w; ++c) {
      switch( field[r][c] ) {
      case 'w' : w_count += 1;
        break;
      case 'b' : b_count += 1;
        break;
      }
    }
  }

  res += 10 * std::min(w_count, b_count) + std::abs(w_count - b_count);
  printf("%d\n", res);
  
  return 0;
}