#include<iostream>
#include<string>
#include<vector>
#include<queue>
#include<stack>
#include<map>
#include<set>
#include<algorithm>
#include<functional>
#include<cstdio>
#include<cstdlib>
#include<cmath>
using namespace std;

#define mind(a,b) (a>b?b:a)
#define maxd(a,b) (a>b?a:b)
#define absd(x) (x<0?-(x):x)
#define pow2(x) ((x)*(x))
#define rep(i,n) for(int i=0; i<n; ++i)
#define repr(i,n) for(int i=n-1; i>=0; --i)
#define repl(i,s,n) for(int i=s; i<=n; ++i)
#define replr(i,s,n) for(int i=n; i>=s; --i)
#define repf(i,s,n,j) for(int i=s; i<=n; i+=j)
#define repe(e,obj) for(auto e : obj)

#define SP << " " <<
#define COL << " : " <<
#define COM << ", " <<
#define ARR << " -> " <<
#define PNT(STR) cout << STR << endl
#define POS(X,Y) "(" << X << ", " << Y << ")"
#define DEB(A) " (" << #A << ") " << A
#define DEBREP(i,n,val) for(int i=0; i<n; ++i) cout << val << " "; cout << endl
#define ALL(V) (V).begin(), (V).end()
#define INF 1000000007
#define INFLL 10000000000000000007LL
#define EPS 1e-9

typedef unsigned int uint;
typedef unsigned long ulong;
typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> P;
//typedef pair<ll, ll> P;
typedef pair<P, int> PI;
typedef pair<int, P> IP;
typedef pair<P, P> PP;
typedef priority_queue<P, vector<P>, greater<P> > pvqueue;

#define W 53
#define N 2203

int h, w;
int a, si, sj, b, gi, gj;
int used[W][W][N];
char m[W][W];

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

int main() {
  cin >> h >> w;
  cin >> a >> si >> sj >> b >> gi >> gj;
  rep(i, h) cin >> m[i];

  queue<PI> que;
  que.push(PI(P(sj, si), a));
  used[si][sj][a] = true;
  while(!que.empty()) {
    PI p = que.front(); que.pop();
    int x = p.first.first, y = p.first.second, sz = p.second;
    rep(k, 4) {
      int nx = x + dx[k], ny = y + dy[k];
      if(nx < 0 || nx >= w || ny < 0 || ny >= h) continue;
      int n_sz = (m[ny][nx]=='*' ? sz+1 : sz-1);
      if(n_sz > (h+w+b+1)) n_sz = (h+w+b);
      if(n_sz>0 && !used[ny][nx][n_sz]) {
        que.push(PI(P(nx, ny), n_sz));
        used[ny][nx][n_sz] = true;
      }
    }
  }
  cout << (used[gi][gj][b] ? "Yes" : "No") << endl;

  return 0;
}