#include <bits/stdc++.h>
#define TASK "coci2021_r6_bold"
#define int long long
#define fi first
#define se second
#define pb push_back
#define ii pair<int, int>
#define vi vector<int>
#define vvi vector<vi>
#define vii vector<ii>
#define reset(f, x) memset(f, x, sizeof(f))
#define all(x) x.begin(), x.end()
#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i)
#define FORD(i, b, a) for (int i = (b), _a = (a); i >= _a; --i)
#define FORV(v, H) for (auto &v: H)
#define __builtin_popcount __builtin_popcountll
#define BIT(mask, i) (mask & (1ll << (i)))
#define MASK(i) (1ll << (i))
#define ONBIT(mask, i) (mask (1ll << (i)))
#define OFFBIT(mask, i) (mask &~ (1ll << (i)))
#define mid(l,r) ((l + r) >> 1)
#define left(id) (id << 1)
#define right(id) ((id << 1) | 1)
#define TIME (1.0*clock()/CLOCKS_PER_SEC)
using namespace std;
const int oo = 1e18;
const int MOD = 1e9 + 7;
const int MAXN = 105;
int N, M;
char A[MAXN][MAXN], B[MAXN][MAXN];
main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cin >> N >> M;
FOR(i, 1, N){
FOR(j, 1, M){
cin >> A[i][j];
B[i][j] = '.';
}
}
FOR(i, 1, N){
FOR(j, 1, M){
if (A[i][j] == '#'){
B[i][j] = '#';
B[i + 1][j] = '#';
B[i][j + 1] = '#';
B[i + 1][j + 1] = '#';
}
}
}
FOR(i, 1, N){
FOR(j, 1, M){
cout << B[i][j];
}
cout << '\n';
}
return 0;
}
