using System;
using System.Collections.Generic;
using System.Linq;

namespace Galaxies11
{
    class Program
    {
        static int[,] matrix;
        static bool[,] isVisited;
        static int counter = 0;
        static List<int> countGalaxies = new List<int>();

        static void Main()
        {
            int[] inputLine = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int rows = inputLine[0];
            int cols = inputLine[1];
            matrix = new int[rows, cols];

            for (int row = 0; row < rows; row++)
            {
                var line = Console.ReadLine().ToCharArray();

                for (int col = 0; col < cols; col++)
                {
                    matrix[row, col] = line[col] - '0';
                }
            }

            isVisited = new bool[rows, cols];

            for (int row = 0; row < rows; row++)
            {
                for (int col = 0; col < cols; col++)
                {
                    int number = matrix[row, col];

                    GalaxySize(number, row, col);

                    if (counter != 0)
                    {
                        countGalaxies.Add(counter);
                        counter = 0;
                    }
                }
            }

            countGalaxies = countGalaxies.OrderByDescending(x => x).ToList();

            foreach (var count in countGalaxies)
            {
                Console.WriteLine(count);
            }
        }

        private static void GalaxySize(int number, int row, int col)
        {
            if (row < 0 || row >= matrix.GetLength(0))
            {
                return;
            }

            if (col < 0 || col >= matrix.GetLength(1))
            {
                return;
            }

            if (isVisited[row, col] || number != matrix[row, col])
            {
                return;
            }

            isVisited[row, col] = true;

            if (number == 1)
            {
                counter++;
            }

            GalaxySize(matrix[row, col], row, col + 1);
            GalaxySize(matrix[row, col], row + 1, col);
            GalaxySize(matrix[row, col], row, col - 1);
            GalaxySize(matrix[row, col], row - 1, col);
        }
    }
}