#include <bits/stdc++.h>
using namespace std;
const int N = 100 + 5;
int n, m;
char arr[N][N], ans[N][N];
int main(){
ios_base::sync_with_stdio(false);cin.tie(NULL);
cin >> n >> m;
for(int i = 1; i <= n; i++){
for(int j = 1; j <= m; j++){
cin >> arr[i][j];
ans[i][j] = '.';
}
}
for(int i = 1; i <= n; i++){
for(int j = 1; j <= m; j++){
if(arr[i][j] == '#') ans[i][j] = ans[i + 1][j] = ans[i][j + 1] = ans[i + 1][j + 1] = '#';
}
}
for(int i = 1; i <= n; i++){
for(int j = 1; j <= m; j++){
cout << ans[i][j];
}
cout << "\n";
}
}