#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int h, w;
  cin >> h >> w;
  vector Grid(h, vector<char>(w));
  rep(i, h) rep(j, w) cin >> Grid[i][j];
  rep(i, h) rep(j, w) {
    if (Grid[i][j] == '.') continue;
    queue<pair<int, int>> q;
    set<pair<int, int>> cc;
    q.push({ i, j });
    cc.insert({ i, j });
    constexpr array<int, 4> dx = { 0, 1, 0, -1 };
    constexpr array<int, 4> dy = { 1, 0, -1, 0 };
    while (!q.empty()) {
      auto [x, y] = q.front();
      q.pop();
      rep(d, 4) {
        int nx = x + dx[d], ny = y + dy[d];
        if (nx < 0 || nx >= h || ny < 0 || ny >= w) continue;
        if (Grid[nx][ny] == Grid[i][j]) {
          if (cc.contains({ nx, ny })) continue;
          q.push({ nx, ny });
          cc.insert({ nx, ny });
        }
      }
    }
    if (cc.size() >= 4) for (auto [x, y] : cc) Grid[x][y] = '.';
  }
  rep(i, h) {
    rep(j, w) cout << Grid[i][j];
    cout << endl;
  }
  return 0;
}