#include <iostream>
#include <vector>
#include <cmath>
#include <iomanip>
#include <array>
#include <tuple>
#include <algorithm>
#include <map>
#include <stack>
#include <queue>
#include <set>
#include <list>

using namespace std;
using ull = unsigned long long;
using ll = long long;
using lli = long long int;
using ld = long double;
using pa = pair<int,int>;
#define SORT(v, n) sort(v, v+n);
#define VSORT(v) sort(v.begin(), v.end());
#define GRESORT(v) sort(v.begin(),v.end(),greater<int>())
#define REVERSE(v) reverse(v.begin(),v.end())
#define overlap(v) v.erase(unique(v.begin(),v.end()),v.end())
#define debug(x) cout << #x << ": " << x << endl
#define INF 999999999

//4近傍
int dy[]={0, 0, 1, -1};
int dx[]={1, -1, 0, 0};

//8近傍
//int dy[]={0,0,1,-1,1,1,-1,-1};
//int dx[]={1,-1,0,0,1,-1,1,-1};

lli mod = 1e9+7;

void solve(){
    int h,w; cin >> h >> w;
    int a,sx,sy; cin >> a >> sx >> sy;
    int b,gx,gy; cin >> b >> gx >> gy;
    string s[60];
    for(int i = 0; i < h; i++) cin >> s[i];
    queue<tuple<int,int,int>> q;
    bool d[60][60][2000];
    d[sx][sy][a] = true;
    q.emplace(sx,sy,a);
    while(!q.empty()){
        int x,y,size;
        tie(x,y,size) = q.front(); q.pop();
        for(int i = 0; i < 4; i++){
            int xx = x + dx[i];
            int yy = y + dy[i];
            if(xx < 0 || yy < 0 || xx >= h || yy >= w) continue;
            int nsize = size + (s[xx][yy] == '.' ? -1 : 1);
            if(nsize <= 0 || nsize > 2000) continue;
            if(d[xx][yy][nsize]) continue;
            d[xx][yy][nsize] = true;
            q.emplace(xx,yy,nsize);
        }
    }
    cout << (d[gx][gy][b] ? "Yes" : "No") << endl;
}

int main(){
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);

    solve();

    return 0;
}