// source problem :
#include <bits/stdc++.h>
using namespace std;
#define all(x) x.begin(), x.end()
#define int long long
#define lb lower_bound
#define ub upper_bound
#define MASK(i) (1LL << (i))
const int inf = 1e18;
void ckmax(int& f, int s)
{
f = (f > s ? f : s);
}
void ckmin(int& f, int s)
{
f = (f < s ? f : s);
}
int32_t main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
int n, m;
cin >> n >> m;
vector<string> a(n);
for (string &S : a) cin >> S;
auto b = a;
for (int i = 0; i + 1 < n; i++) {
for (int j = 0; j + 1 < m; j++) {
if (a[i][j] == '#') {
b[i][j] = b[i + 1][j] = b[i][j + 1] = b[i + 1][j + 1] = '#';
}
}
}
for (string s : b) cout << s << '\n';
return 0;
}
