#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, m;
  cin >> n >> m;
  vector<string> s(n);
  rep(i, n) cin >> s[i];
  dsu uf(n * m);
  rep(i, n) rep(j, m - 1) if (s[i][j] != '.' && s[i][j] == s[i][j+1]) uf.merge(i * m + j, i * m + j + 1);
  rep(i, n - 1) rep(j, m) if (s[i][j] != '.' && s[i][j] == s[i+1][j]) uf.merge(i * m + j, (i + 1) * m + j);
  for (const auto& g : uf.groups()) if (g.size() >= 4) {
    for (int x : g) s[x / m][x % m] = '.';
  }
  rep(i, n) cout << s[i] << '\n';
}