#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
 
using namespace std;
using namespace __gnu_pbds;
typedef long long int lld;
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
#define rep(i,a,b) for(int i=a;i<b;i++)
#define trav(a,v) for(auto a:v)
string table[3000];
pair<int,int> nxt[3000][3000];
int col[3000][3000];
int cnt;
int n,m;
vector<pair<int,int> > nei[4000000];
bool in(int a, int b){
	if(a>=0 && a<n && b>=0 && b<m && table[a][b]=='#')return true;
	return false;
}
void DFS(int a, int b){
	col[a][b]=cnt;
	rep(dx,-1,2){
		rep(dy,-1,2){
			if(abs(dx)+abs(dy)==1 && in(a+dx,b+dy) && col[a+dx][b+dy]==-1){
				DFS(a+dx,b+dy);
			}
		}
	}
}
lld dist[4000000];
string ans[3000];
void solve(){
	cin>>n>>m;
	rep(i,0,n)cin>>table[i];
	rep(j,0,m){
		pair<int,int> p={-1,-1};
		rep(i,0,n){
			if(table[i][j]=='#'){
				nxt[i][j]=p;
				p={i,j};
			}
		}
		nxt[n][j]=p;
	}
	cnt=1;
	rep(i,0,n){
		rep(j,0,m){
			col[i][j]=-1;
		}
	}
	rep(i,0,n){
		rep(j,0,m){
			if(col[i][j]==-1 && in(i,j))DFS(i,j),cnt++;
		}
	}
	
	rep(j,0,m)col[n][j]=0;
	rep(i,0,n+1){
		rep(j,0,m){
			if((i==n || table[i][j]=='#') && nxt[i][j].first!=-1){
				//cout<<col[i][j]<<" "<<col[nxt[i][j].first][nxt[i][j].second]<<" "<<i-nxt[i][j].first<<endl;
				nei[col[i][j]].push_back({col[nxt[i][j].first][nxt[i][j].second],i-nxt[i][j].first-1});
			}
		}
	}
	priority_queue<pair<lld,int> >pq;
	rep(i,0,cnt)dist[i]=1e18;
	pq.push({0,0});
	dist[0]=0;
	while(!pq.empty()){
		lld d=-pq.top().first;
		int v=pq.top().second;
		pq.pop();
		if(d>dist[v])continue;
		trav(a,nei[v]){
			if(dist[a.first]>dist[v]+a.second){
				dist[a.first]=dist[v]+a.second;
				pq.push({-dist[a.first],a.first});
			}
		}
	}
	//~ rep(i,0,cnt)cout<<dist[i]<<" ";
	//~ cout<<"\n";
	rep(i,0,n){
		rep(j,0,m)ans[i]+=".";
	}
	rep(i,0,n){
		rep(j,0,m){
			if(table[i][j]=='#'){
				ans[i+dist[col[i][j]]][j]='#';
			}
		}
	}
	rep(i,0,n)cout<<ans[i]<<"\n";
	
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	int tt=1;
	//cin>>tt;
	while(tt--){
		solve();
	}
}