#include <iostream>
#include <algorithm>
#include <vector>
#include <cstdio>
#include <queue>
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
int dx[4] = {1, 0, 0, -1};
int dy[4] = {0, 1, -1, 0};
int h, w;
int a, si, sj;
int b, gi, gj;
string s[51];
bool board[51][51][51];
struct t{
	int size, y, x;
	t(int size, int y, int x) : size(size), y(y), x(x) {}
};

int main(void){
	cin >> h >> w;
	cin >> a >> si >> sj;
	cin >> b >> gi >> gj;
	rep(i, h) cin >> s[i];
	queue<t> q;
	q.push(t(a, si, sj));
	board[a][si][sj] = true;
	while(!q.empty()){
		t now = q.front(); q.pop();
		for (int i = 0; i < 4; ++i){
			if(0 <= now.y + dy[i] && now.y + dy[i] < h &&
			   0 <= now.x + dx[i] && now.x + dx[i] < w){
				if(s[now.y + dy[i]][now.x + dx[i]] == '*'){
					if(now.size <= 49 && board[now.size + 1][now.y + dy[i]][now.x + dx[i]] == false){
						board[now.size + 1][now.y + dy[i]][now.x + dx[i]] = true;
						q.push(t(now.size + 1, now.y + dy[i], now.x + dx[i]));
					}
				}else{
					if(1 <= now.size && board[now.size - 1][now.y + dy[i]][now.x + dx[i]] == false){
						board[now.size - 1][now.y + dy[i]][now.x + dx[i]] = true;
						q.push(t(now.size - 1, now.y + dy[i], now.x + dx[i]));
					}
				}
			}
		}
	}

	if(board[b][gi][gj]) printf("YES\n");
	else printf("NO\n");
	return 0;
}