import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.StringTokenizer;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author Chiaki.Hoshinomori
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        Task455 solver = new Task455();
        solver.solve(1, in, out);
        out.close();
    }

    static class Task455 {
        public void solve(int testNumber, InputReader in, PrintWriter out) {
            int n = in.nextInt();
            int m = in.nextInt();
            char[][] s = new char[n][];
            int x1 = -1, y1 = -1;
            int x2 = -1, y2 = -1;
            for (int i = 0; i < n; i++) {
                s[i] = in.next().toCharArray();
                for (int j = 0; j < n; j++) {
                    if (s[i][j] == '*') {
                        if (x1 == -1) {
                            x1 = i;
                            y1 = j;
                        } else {
                            x2 = i;
                            y2 = j;
                        }
                    }
                }
            }
            for (int i = 0; i < n; i++) {
                for (int j = 0; j < n; j++) {
                    if (s[i][j] == '*') continue;
                    if ((x2 - x1) * (j - y1) - (i - x1) * (y2 - x2) != 0) {
                        s[i][j] = '*';
                        for (int k = 0; k < n; k++) {
                            out.println(s[k]);
                        }
                        return;
                    }
                }
            }
        }

    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    }
}