#include <iostream>
#include <vector>
#include <queue>
#include <tuple>
#define repeat(i,n) for (int i = 0; (i) < (n); ++(i))
using namespace std;
const int lim = 10000;
const int dy[4] = { -1, 1, 0, 0 };
const int dx[4] = { 0, 0, 1, -1 };
int main() {
    int h, w; cin >> h >> w;
    int a, sy, sx; cin >> a >> sy >> sx;
    int b, gy, gx; cin >> b >> gy >> gx;
    vector<string> m(h); repeat (y,h) cin >> m[y];
    vector<vector<vector<bool> > > used(lim, vector<vector<bool> >(h, vector<bool>(w)));
    queue<tuple<int,int,int> > que;
    que.push(make_tuple(a, sy, sx));
    used[a][sy][sx] = true;
    while (not que.empty()) {
        int c, y, x; tie(c, y, x) = que.front(); que.pop();
        repeat (i,4) {
            int ny = y + dy[i];
            int nx = x + dx[i];
            if (0 <= ny and ny < h and 0 <= nx and nx < w) {
                int nc = c + (m[ny][nx] == '*' ? 1 : -1);
                if (1 <= nc and nc < lim) {
                    if (not used[nc][ny][nx]) {
                        used[nc][ny][nx] = true;
                        que.push(make_tuple(nc, ny, nx));
                    }
                }
            }
        }
    }
    cout << (used[b][gy][gx] ? "Yes" : "No") << endl;
    return 0;
}