#include<iostream>
#include<sstream>
#include<cstdio>
#include<cstring>
#include<string>
#include<vector>
#include<list>
#include<queue>
#include<stack>
#include<utility>
#include <fstream>
#include<set>
#include<map>
#include<cctype>
#include<cmath>
#include<algorithm>
#include <numeric>
using namespace std;


#define RALL(x) (x).rbegin(),(x).rend()
#define ALL(x) (x).begin(),(x).end()
#define repp(i,n) for(int (i)=1;(i)<=(n);(i)++)
#define rep(i,n) for(int (i)=0;(i)<(n);(i)++)
#define rev(i,n) for(int (i)=(n-1);(i)>=0;(i)--)
#define clr(a) memset((a), 0 ,Nof(a))
#define found(s,e) ((s).find(e)!=(s).end())

typedef pair<int,int> P;
typedef vector<pair<int,int> > pii;
typedef map<string,int> mdi;


int dist[5000][5000];
queue<int>Q;

int main(){
	int h,w,t,x,y;
	string s;
	cin >> h >> w;
	for(int i=2;i<=h+1;i++){
		cin >> s;
		for(int j=2;j<=w+1;j++){
			if(s[j-2]=='#')
				dist[i][j]=5000;
		}
	}
	
	for(int i=1;i<=h+2;i++){
		for(int j=1;j<=w+2;j++){
			if(dist[i][j]==0){
				Q.push(0);
				Q.push(i);
				Q.push(j);
			}
		}
	}
	int dx[]={0,  0, 1, 1,  1, -1, -1, -1};
	int dy[]={1, -1, 1, 0, -1, -1,  0,  1};
	
	while(Q.size()){
		t=Q.front(); Q.pop();
		x=Q.front(); Q.pop();
		y=Q.front(); Q.pop();
		
		for(int i=0;i<8;i++){
			int nx=x+dx[i];
			int ny=y+dy[i];
			
			if(dist[nx][ny]>t+1){
				dist[nx][ny]=t+1;
				Q.push(t+1); Q.push(nx); Q.push(ny);
			}
		}
	}
	
	cout << dist[x][y] << endl;
	
	cout << endl;
	for(int i=0;i<h+2;i++){
		for(int j=0;j<w+2;j++){
			cout << dist[i][j] << " ";
		}
		cout << endl;
	}
	return 0;
}