#include<bits/stdc++.h>
using namespace std;
const int N=2003,M=2000001;
int dx[4]={1,0,-1,0},dy[4]={0,1,0,-1};
int n,m,id[N][N],ci;
short d[M],w[M];
bool vis[M];
int hd[M],to[M],nx[M],num;
void add(int x,int y,int z){
	nx[++num]=hd[x],hd[x]=num,to[num]=y,w[num]=z;
}
char s[N][N];
vector<int>q[N];
void dfs(int x,int y){
	id[x][y]=ci;
	for(int i=0;i<4;++i){
		int X=x+dx[i],Y=y+dy[i];
		if(X<1||X>n||Y<1||Y>m||s[X][Y]=='.')continue;
		if(!id[X][Y])dfs(X,Y);
	}
}
int main(){
	scanf("%d%d",&n,&m);
	for(int i=1;i<=n;++i)scanf("%s",s[i]+1);
	for(int i=1;i<=n;++i)for(int j=1;j<=m;++j)if(s[i][j]=='#'&&!id[i][j])++ci,dfs(i,j);
	for(int i=1;i<=n;++i)for(int j=1;j<=m;++j)if(id[i][j]){
		short o=i+1;
		while(o<=n&&s[o][j]=='.')++o;
		if(id[i][j]&&id[o][j]!=id[i][j])add(id[o][j],id[i][j],o-i-1);
	}
	for(int i=1;i<=ci;++i)d[i]=1e4;
	d[0]=0;
	for(int i=hd[0],v;v=to[i],i;i=nx[i])d[v]=min(d[v],w[i]);
	for(int i=0;i<n;++i){
		while(!q[i].empty()){
			int u=q[i].back();
			q[i].pop_back();
			if(vis[u])continue;
			vis[u]=true;
			for(int i=hd[u],v;v=to[i],i;i=nx[i])if(d[v]>d[u]+w[i]){
				d[v]=d[u]+w[i];
				q[d[v]].emplace_back(v);
			}
		}
		q[i].shrink_to_fit();
	}
	for(int i=1;i<=n;++i)for(int j=1;j<=m;++j)s[i][j]='.';
	for(int i=1;i<=n;++i)for(int j=1;j<=m;++j)if(id[i][j])s[i+d[id[i][j]]][j]='#';
	for(int i=1;i<=n;++i){
		for(int j=1;j<=m;++j)putchar(s[i][j]);
		putchar(10);
	}
	return 0;
}