void main(){
  import std.stdio, std.string, std.conv, std.algorithm;
  import std.container, std.typecons;

  int h, w; rd(h, w);
  int a, si, sj; rd(a, si, sj);
  int b, gi, gj; rd(b, gi, gj);
  auto mat=new char[][](h, w);
  foreach(i; 0..h) mat[i]=readln.chomp.to!(char[]);

  alias T=Tuple!(int, "sz", int, "i", int, "j");
  auto dir=[[0, 1], [0, -1], [1, 0], [-1, 0]];
  auto vis=new bool[][][](2000, h, w);
  auto Q=new DList!(T)(T(a, si, sj));
  while(!Q.empty){
    auto cur=Q.front; Q.removeFront;
    if(cur.sz==b && cur.i==gi && cur.j==gj){writeln("Yes"); return;}
    foreach(d; dir){
      auto ni=cur.i+d[0], nj=cur.j+d[1];
      if(ni<0 || nj<0 || ni>=h || nj>=w) continue;
      auto nsz=cur.sz+(mat[ni][nj]=='*'?1:-1);
      if(nsz>0 && nsz<2000 && !vis[nsz][ni][nj]){
        vis[nsz][ni][nj]=true;
        Q.insertFront(T(nsz, ni, nj));
      }
    }
  }

  writeln("No");
}

void rd(T...)(ref T x){
  import std.stdio, std.string, std.conv;
  auto l=readln.split;
  assert(l.length==x.length);
  foreach(i, ref e; x){
    e=l[i].to!(typeof(e));
  }
}