#include <bits/stdc++.h>
using namespace std;
typedef pair<pair<int, int>, int> P;

const int L = 55;
char C[L][L];

bool ok[L][L][2510]; // x, y, snow

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

int h, w, a, b;
int sx, sy, gx, gy;

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

    cin >> h >> w;
    cin >> a >> sx >> sy;
    cin >> b >> gx >> gy;

    for(int i = 0; i < h; i++){
        for(int j = 0; j < w; j++){
            cin >> C[i][j];
        }
    }

    bool f = false;

    queue<P> q;
    q.push({{sx, sy}, a});
    while(!q.empty()){
        P p = q.front();
        q.pop();
        int x = p.first.first;
        int y = p.first.second;
        int snow = p.second;
        // cout << x << ' ' << y << ' ' << snow << endl;
        
        ok[x][y][snow] = true;
        if(x == gx and y == gy and snow == b){
            break;
        }
        
        for(int i = 0; i < 4; i++){
            int nx, ny;
            nx = dx[i] + x;
            ny = dy[i] + y;
            if(nx < 0 or ny < 0 or nx >= h or ny >= w){
                continue;
            }
            int m = (C[nx][ny] == '*' ? 1 : -1) + snow;
            if(m <= 0 or m >= 2510 or m > b + h * w) continue;
            if(ok[nx][ny][m]) continue;
            q.push({{nx, ny}, m});
        } 
    }

    cout << (ok[gx][gy][b] ? "Yes" : "No") << endl;

    return 0;
}