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

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

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

            for (int i = 0; i < nm[0]; i++)
            {
                var line = Console.ReadLine().ToCharArray();
                for (int j = 0; j < nm[1]; j++)
                {
                    matrix[i, j] = line[j] - '0';
                }
            }

            isVisited = new bool[nm[0], nm[1]];
            for (int row = 0; row < nm[0]; row++)
            {
                for (int col = 0; col < nm[1]; col++)
                {
                    SizeCounter(matrix[row, col], row, col);
                    if (counter != 0)
                    {
                        galaxiesCount.Add(counter);
                        counter = 0;
                    }
                }
            }

            galaxiesCount = galaxiesCount.OrderByDescending(x => x).ToList();
            for (int i = 0; i < galaxiesCount.Count; i++)
            {
                Console.WriteLine(galaxiesCount[i]);
            }
        }

        private static void SizeCounter(int number, int row, int col)
        {
            if (row < 0 || row >= matrix.GetLength(0) || col < 0 || col >= matrix.GetLength(1))
            {
                return;
            }
            if (isVisited[row, col] || number != matrix[row, col])
            {
                return;
            }

            isVisited[row, col] = true;
            if (number == 1)
            {
                counter++;
            }
            SizeCounter(matrix[row, col], row + 1, col);
            SizeCounter(matrix[row, col], row, col + 1);
            SizeCounter(matrix[row, col], row - 1, col);
            SizeCounter(matrix[row, col], row, col - 1);
        }
    }
}