SmallWorld

import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class SmallWorldTwo {
    public static ArrayList<Integer> list = new ArrayList<>();

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        String[] input = scanner.nextLine().split(" ");

        int cols = Integer.parseInt(input[0]);
        int rows = Integer.parseInt(input[1]);
        String[][] matrix = new String[cols][rows];

        for (int i = 0; i < cols; i++) {
            matrix[i] = scanner.nextLine().split("");
        }

        for (int row = 0; row < matrix.length; row++) {
            for (int col = 0; col < matrix[row].length; col++) {
                if (matrix[row][col].equals("1")) {
                    list.add(dfs(matrix, row, col));
                }
            }
        }
        list.sort(Collections.reverseOrder());
        for (Integer integer : list) {
            System.out.println(integer);
        }
    }

    public static int dfs(String[][] matrix, int row, int col) {
        if (row < 0 || col < 0 || row >= matrix.length || col >= matrix[row].length) {
            return 0;
        }
        String position = matrix[row][col];
        if (!position.equals("1")) {
            return 0;
        }
        int count = 1;
        matrix[row][col] = "0";
        count += dfs(matrix, row - 1, col);
        count += dfs(matrix, row + 1, col);
        count += dfs(matrix, row, col - 1);
        count += dfs(matrix, row, col + 1);

        return count;
    }
}