#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>
#include <set>
#include <bitset>
using namespace std;

typedef bitset<2550> bits;

int main(){
	int h,w;
	cin >> h >> w;
	vector<int> a(2),r(2),c(2);
	for(int i=0; i<2; i++) cin >> a[i] >> r[i] >> c[i];
	vector<string> m(h);
	for(int i=0; i<h; i++) cin >> m[i];
	
	bits inc,dec;
	for(int i=0; i<h; i++){
		for(int j=0; j<w; j++){
			(m[i][j]=='.'?dec:inc).set( (w+1)*i + j );
		}
	}
	
	int mx_size = 1200;
	int times = 1200;
	
	vector<bits> s(mx_size);
	s[a[0]].set( (w+1)*r[0] + c[0] );
	
	for(int i=0; i<times; i++){
		for(int k=max(a[0]-i, 1); k<min(a[0]+i+1, mx_size); k++){
			bits tmp = (s[k]<<1) | (s[k]>>1) | (s[k]<<(w+1)) | (s[k]>>(w+1));
			if(k+1<mx_size){
				s[k+1] |= tmp & inc;
			}
			
			if(k-1>0){
				s[k-1] |= tmp & dec;
			}
		}
		if(s[a[1]][(w+1)*r[1] + c[1]]){
			cout << "Yes" << endl;
			return 0;
		}
	}
	
	if(s[a[1]][(w+1)*r[1] + c[1]]){
		cout << "Yes" << endl;
	}else{
		cout << "No" << endl;
	}
	
	return 0;
}