#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair< int, int > pii;
typedef vector< int > vi;
typedef vector< vi > vvi;
typedef vector< ll > vl;
typedef vector< vl > vvl;
typedef vector< pii > vp;
typedef vector< vp > vvp;
typedef vector< string > vs;
typedef vector< double > vd;
typedef vector< vd > vvd;

template< class T1, class T2 >
int upmin( T1 &x, T2 v ){
  if( x > v ){
    x = v;
    return 1;
  }
  return 0;
}

template< class T1, class T2 >
int upmax( T1 &x, T2 v ){
  if( x < v ){
    x = v;
    return 1;
  }
  return 0;
}

const int INF = 0x3f3f3f3f;

int H, W;
vs G;

void init(){
  cin >> H >> W;
  G = vs( H );
  for( int i = 0; i < H; ++i )
    cin  >> G[ i ];
}

vp pnt;

void preprocess(){
  for( int i = 0; i < H; ++i )
    for( int j = 0; j < W; ++j )
      if( G[ i ][ j ] == '*' )
        pnt.emplace_back( i, j );
}

int ok( pii a, pii b, pii c ){
  int dx1 = b.first - a.first;
  int dy1 = b.second - a.second;
  int dx2 = c.first - b.first;
  int dy2 = c.second - b.second;
  int g1 = __gcd( dx1, dy1 );
  int g2 = __gcd( dx2, dy2 );
  dx1 /= g1, dy1 /= g1;
  if( dx1 < 0 ) dx1 *= -1, dy1 *= -1;
  dx2 /= g2, dy2 /= g2;
  if( dx2 < 0 ) dx2 *= -1, dy2 *= -1;
  return not ( dx1 == dx2 and dy1 == dy2 );
}

void solve(){
  for( int i = 0; i < H; ++i )
    for( int j = 0; j < W; ++j )
      if( G[ i ][ j ] != '*' )
        if( ok( pnt[ 0 ], pnt[ 1 ], make_pair( i, j ) ) ){
          G[ i ][ j ] = '*';
          for( int x = 0; x < H; ++x, cout << endl )
            for( int y = 0; y < W; ++y )
              cout << G[ x ][ y ];
          exit( 0 );
        }
}

signed main(){
  ios::sync_with_stdio( 0 );
  init();
  preprocess();
  solve();
  return 0;
}