import java.util.*;

public class SmallWorld {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String[] gridSize = scanner.nextLine().split(" ");
        String[][] grid = new String[Integer.parseInt(gridSize[0])][Integer.parseInt(gridSize[1])];
        ArrayList<Integer> myArr = new ArrayList<>();
        int counter = 1;
        boolean[][] gridCheck = new boolean[Integer.parseInt(gridSize[0])][Integer.parseInt(gridSize[1])];
        for (int i = 0; i < Integer.parseInt(gridSize[0]); i++) {
            String inputString = scanner.nextLine();
            grid[i] = inputString.split("");
        }
        moveAroundGrid(grid, gridCheck, counter, myArr);
        Collections.sort(myArr, Collections.reverseOrder());
        myArr
                .forEach(System.out::println);
    }

    public static void moveAroundGrid(String[][] grid, boolean[][] gridCheck, int counter, ArrayList<Integer> myArr){
        String test;
        int maxNumber = 0;
        if (grid.length == 0) {
            return;
        }
        for (int i = 0; i < grid.length; i++) {
            for (int j = 0; j < grid[0].length; j++) {
                if (gridCheck[i][j] || grid[i][j].equals("0")) {
                    continue;
                }
                test = grid[i][j];
                counter = countOccurrencies(grid, gridCheck, i, j, test);
                myArr.add(counter);
            }
        }
    }

    public static int countOccurrencies(String[][] grid, boolean[][] gridCheck, int row, int col, String test) {
        if (outOfGrid(grid, row, col)) {
            return 0;
        }
        if (gridCheck[row][col]) {
            return 0;
        }
        if (!grid[row][col].equals(test)) {
            return 0;
        }
        gridCheck[row][col] = true;
        return 1 + countOccurrencies(grid, gridCheck, row + 1, col, test)
                + countOccurrencies(grid, gridCheck, row, col + 1, test)
                + countOccurrencies(grid, gridCheck, row - 1, col, test)
                + countOccurrencies(grid, gridCheck, row, col - 1, test);
    }

    private static boolean outOfGrid(String[][] grid, int row, int col) {
        return row < 0 || col < 0 || row >= grid.length || col >= grid[0].length;
    }
}