import java.util.Scanner;


public class Y421 {
	int N, M;
	char[][] S;
	int[][] matchRow, matchCol;
	boolean[][] checked;
	
	
	Y421() {
	    Scanner sc = new Scanner(System.in);	
	    N = sc.nextInt();
	    M = sc.nextInt();
	    
	    S = new char[N][];
	    
	    for (int i = 0; i < S.length; i++) {
			S[i] = sc.next().toCharArray();
		}
	    
	    matchRow = new int[N][M];
	    matchCol = new int[N][M];
	   
	    for (int i = 0; i < N; i++) {
	    	for (int j = 0; j < M; j++) {
	    		matchRow[i][j] = -1;
	    		matchCol[i][j] = -1;
	    	}
	    }

	    
	    int cnt = 0;
	    for (int i = 0; i < N; i++) {
	    	for (int j = 0; j < M; j++) {
	    		if (matchCol[i][j] == -1 && S[i][j] != '.') {
	    			checked = new boolean[N][M];
	    			if (search(i, j)) {
	    				cnt++;
	    			}
	    		}
	    	}
	    }
	    
	    int black = 0, white = 0;
	    for (int i = 0; i < N; i++) {
	    	for (int j = 0; j < M; j++) {
	    		if (matchCol[i][j] < 0) {
	    			if (S[i][j] == 'b') black++;
	    			if (S[i][j] == 'w') white++;
	    		}
	    	}
	    }
	    
	    int happiness = cnt * 100 + 10 * Math.min(black,  white) + Math.abs(black - white);
	    
	    System.out.println(happiness);
	}
	
	boolean search(int i, int j) {
	    if (checked[i][j]) {
	    	return false;
	    }
	    
		checked[i][j] = true;
	    
		
		int[] i_array = { i, i-1, i, i+1 };
	    int[] j_array = { j-1, j, j+1, j };
	    
	    for (int i2 : i_array) {
	    	for (int j2 : j_array) {
				if (0 <= i2 && i2 < N && 0 <= j2 && j2 < M) {
					if (S[i2][j2] != '.' && S[i][j] != S[i2][j2]) {
						if (matchCol[i2][j2] < 0 || search(matchRow[i2][j2], matchCol[i2][j2])) {
							matchCol[i][j] = j2;
							matchRow[i][j] = i2;
							matchCol[i2][j2] = j;
							matchRow[i2][j2] = i;
							return true;
						}
					}
				}
	    	}
	    }
	    return false;
	}
	
	public static void main(String argv[]) {
		new Y421();
	}
}