#include<cstdio>
#include<vector>
#include<queue>
#include<cstring>
#include<iostream>
#include<algorithm>
#include<ctime>
#include<random>
#include<array>
#include<assert.h>
#define pb emplace_back
#define mp make_pair
#define fi first
#define se second
#define dbg(x) cerr<<"In Line "<< __LINE__<<" the "<<#x<<" = "<<x<<'\n'
#define dpi(x,y) cerr<<"In Line "<<__LINE__<<" the "<<#x<<" = "<<x<<" ; "<<"the "<<#y<<" = "<<y<<'\n'
#define DE(fmt,...) fprintf(stderr, "Line %d : " fmt "\n",__LINE__,##__VA_ARGS__)
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int>pii;
typedef pair<ll,int>pli;
typedef pair<ll,ll>pll;
typedef pair<int,ll>pil;
typedef vector<int>vi;
typedef vector<ll>vll;
typedef vector<pii>vpii;
typedef vector<pll>vpll;
template<typename T>T cmax(T &x, T y){return x=x>y?x:y;}
template<typename T>T cmin(T &x, T y){return x=x<y?x:y;}
template<typename T>
T &read(T &r){
	r=0;bool w=0;char ch=getchar();
	while(ch<'0'||ch>'9')w=ch=='-'?1:0,ch=getchar();
	while(ch>='0'&&ch<='9')r=r*10+(ch^48),ch=getchar();
	return r=w?-r:r;
}
template<typename T1,typename... T2>
void read(T1 &x,T2& ...y){read(x);read(y...);}
const int mod=998244353;
inline void cadd(int &x,int y){x=(x+y>=mod)?(x+y-mod):(x+y);}
inline void cdel(int &x,int y){x=(x-y<0)?(x-y+mod):(x-y);}
inline int add(int x,int y){return (x+y>=mod)?(x+y-mod):(x+y);}
inline int del(int x,int y){return (x-y<0)?(x-y+mod):(x-y);}
int qpow(int x,int y){
	int s=1;
	while(y){
		if(y&1)s=1ll*s*x%mod;
		x=1ll*x*x%mod;
		y>>=1;
	}
	return s;
}
const int N=4000010;
int n,m,tot;
int bl[N],et;
string a[N],b[N];
char str[N];
int id(int x,int y){return (x-1)*m+y;}
int X(int o){return (o-1)/m+1;}
int Y(int o){return o%m==0?m:o%m;}
int dx[]={1,-1,0,0};
int dy[]={0,0,1,-1};
void dfs(int x,int y,int o){
	bl[id(x,y)]=o;
	for(int i=0;i<4;i++){
		int u=x+dx[i],v=y+dy[i];
		if(u>=1&&u<=n&&v>=1&&v<=m&&!bl[id(u,v)]&&a[u][v]=='#')
			dfs(u,v,o);
	}
}
int dis[N],vis[N];
vpii eg[N];
signed main(){
	#ifdef do_while_true
//		assert(freopen("data.in","r",stdin));
//		assert(freopen("data.out","w",stdout));
	#endif
	read(n,m);tot=n*m;
	for(int i=1;i<=n;i++){
		scanf("%s",str+1);
		a[i].resize(m+1);b[i].resize(m+1);
		for(int j=1;j<=m;j++)a[i][j]=str[j];
	}
	for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++)if(a[i][j]=='#'&&!bl[id(i,j)]){
			++et;
			dfs(i,j,et);
		}
	for(int i=1;i<=et;i++)dis[i]=n+1;
	for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++)if(a[i][j]=='#'){
			cmin(dis[bl[id(i,j)]],n-i);
			int p=0;
			for(int k=i-1;k>=1;k--)if(a[k][j]=='#'){
				p=k;break;
			}
			if(!p)continue;
			if(bl[id(i,j)]!=bl[id(p,j)]){
				eg[bl[id(i,j)]].pb(bl[id(p,j)],i-p-1);
			}
		}
	priority_queue<pii,vpii,greater<pii>>q;
	for(int i=1;i<=et;i++)q.push(mp(dis[i],i));
	while(!q.empty()){
		int x=q.top().se;q.pop();
		if(vis[x])continue;
		vis[x]=1;
		for(auto [v,w]:eg[x]){
			if(dis[v]>dis[x]+w){
				dis[v]=dis[x]+w;
				q.push(mp(dis[v],v));
			}
		}
	}
	for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++)
			b[i][j]='.';
	for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++)if(a[i][j]=='#'){
			b[i+dis[bl[id(i,j)]]][j]='#';
		}
	cerr<<'\n';
	for(int i=1;i<=n;i++,puts(""))
		for(int j=1;j<=m;j++)
			putchar(b[i][j]);
    #ifdef do_while_true
//		cerr<<'\n'<<"Time:"<<1.0*clock()/CLOCKS_PER_SEC*1000<<" ms"<<'\n';
	#endif
	return 0;
}