#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint1000000007;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000000
int H,W;
int get(int y,int x){
	return y*W+x;
}

pair<int,int> get(int v){
	return make_pair(v/W,v%W);
}

string alpha = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

void go(vector<string> S){
	/*
	rep(i,S.size()){
		cout<<S[i]<<endl;
	}
	*/
	
	int cnt = 0;
	mf_graph<int> G(H*W+2);
	int s = H*W,t = H*W+1;
	vector<int> dx = {1,-1,0,0},dy = {0,0,1,-1};
	rep(i,H){
		rep(j,W){
			if(S[i][j]=='#')cnt++;
			else continue;
			if((i+j)%2==0){
				G.add_edge(s,get(i,j),1);
				rep(k,4){
					int y = i+dy[k],x = j + dx[k];
					if(y<0||y>=H||x<0||x>=W)continue;
					G.add_edge(get(i,j),get(y,x),1);
				}
			}
			else G.add_edge(get(i,j),t,1);
		}
	}
//	cout<<cnt<<endl;
	if(G.flow(s,t)*2!=cnt)return;
	int ind = 0;
	auto E = G.edges();
	for(auto e:E){
		if(e.from==s||e.to==t)continue;
		if(e.flow==0)continue;
		int u = e.from,v = e.to;
		auto A = get(u),B = get(v);
		if(S[A.first][A.second]!='#')continue;
		S[A.first][A.second] = alpha[ind];
		S[B.first][B.second] = alpha[ind];
		ind++;
	}
	cout<<"Yes"<<endl;
	rep(i,S.size()){
		cout<<S[i]<<endl;
	}
	exit(0);
	
}

int main(){
	
	
	cin>>H>>W;
	
	vector<string> S(H);
	rep(i,H)cin>>S[i];
	int u = -1,b = -1;
	rep(i,H){
		if(S[i]!=string(W,'.')){
			if(u==-1)u = i;
			b = i;
		}
	}
	
	rep(i,H){
		int c = 0;
		rep(j,W){
			if(S[i][j]=='.')c++;
		}
		if(c==0){
			cout<<"No"<<endl;
			return 0;
		}
	}

	if(u==-1){
		cout<<"Yes"<<endl;
		rep(i,H){
			cout<<S[i]<<endl;
		}
		return 0;
	}
	if(b!=H-1){
		cout<<"No"<<endl;
		return 0;
	}
	
	for(int j=u;j<=b;j++){
		if(S[j]==string(W,'.')){
			cout<<"No"<<endl;
			return 0;
		}
	}
	
	rep(i,1<<H){
		int cur = H-1;
		vector<string> SS(H,string(W,'.'));
		for(int j=H-1;j>=0;j--){
			if((i>>j)&1){
				SS[j] = string(W,'#');
			}
			else{
				if(cur<u)continue;
				SS[j] = S[cur];
				cur--;
			}
		}
		if(cur>=u)continue;
		go(SS);
	}
	cout<<"No"<<endl;
	
    return 0;
}