#include <bits/stdc++.h>
using namespace std;

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

int n, m;
int a, sx, sy, b, gx, gy;
string c[50];
bool vis[50][50][2510];

int main(){
  cin >> n >> m >> a >> sx >> sy >> b >> gx >> gy;
  for (int i = 0; i < n; i++) cin >> c[i];

  queue<tuple<int, int, int>> q;
  vis[sx][sy][a] = true;
  q.emplace(sx, sy, a);
  while (q.size()){
    int x, y, s;
    tie(x, y, s) = q.front();
    q.pop();
    for (int i = 0; i < 4; i++){
      int nx = x + dx[i];
      int ny = y + dy[i];
      if (nx < 0 || n <= nx || ny < 0 || m <= ny) continue;
      int ns = s + (c[nx][ny] == '*' ? 1 : -1);
      if (ns <= 0 || ns > 2510) continue;
      if (vis[nx][ny][ns]) continue;
      vis[nx][ny][ns] = true;
      q.emplace(nx, ny, ns);
    }
  }

  cout << (vis[gx][gy][b] ? "Yes\n" : "No\n");
}