#include <bits/stdc++.h>
using namespace std;

char arr[3000][3000]; int a, b; char all[3000][3000];
bool car()
{
    for (int i = 0; i < a-1; i++)
    {
        for (int j = 0; j < b; j++)
        {
            if (arr[i][j] == 'X')
            {
                if (arr[i+1][j] == '#')
                    return false;
            }
        }
    }
    return true;
}
int main() {
    ios::sync_with_stdio(false);
    cin >> a >> b;
    for (int i = 0; i < a; i++)
    {
        for (int j = 0; j < b; j++)
        {
            cin >> arr[i][j];
        }
    }
    int k = 0;
    while (car())
    {
        for (int i = 0; i < a; i++)
        {
            for (int j = 0; j < b; j++)
            {
                    if (i == 0 && k == 0)
                        all[i][j] = '.';
                    else if (arr[i][j] != '#')
                        all[i][j] = arr[i-1][j];
                    else if (arr[i][j] == '#')
                        all[i][j] = '#';
                    else if (i == a-1 && k == 0)
                    {
                        all[i][j] = '#'; k++;
                    }
            }
        }
        memcpy(arr, all, sizeof(arr));
    }
    for (int i = 0; i < a; i++)
    {
        for (int j = 0; j < b; j++)
        {
            cout << arr[i][j];
        }
        if (i != a-1)
            cout << '\n';
    }
    return 0;
}