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

typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> veci;
typedef vector<string> vecs;
template<class T,class U> using Hash=unordered_map<T,U>;

#define REP(i, a, n) for(ll i = a; i < n; i++)
#define RREP(i, a, n) for(ll i = n-1; i >= a; i--)
#define rep(i, n) REP(i, 0, n)
#define rrep(i, n) RREP(i, 0, n)
#define MD 1000000007

template<class T> T read(){T a;cin >> a;return a;}
template<class T> void read(T& a){cin >> a;}
template<class T> void rarr(T a, int n){for(int i = 0; i < n; i++) {cin >> a[i];}}
template<class T> void write(T a){cout << a << endl;}
template<class T> void writes(vector<T> a, const char* c = " "){cout << a[0];for(int i = 1; i < (int)a.size(); i++)cout << c << a[i];cout << endl;;}
void write(double a){cout << fixed << setprecision(12) << a << endl;}
void write(long double a){cout << fixed << setprecision(12) << a << endl;}
template<class T> void warr(T a, int n, const char* c = " "){cout << a[0];for(int i = 1; i < n; i++)cout << c << a[i];cout << endl;}
void split(string s, string delim, veci& result){result.clear();string::size_type pos = 0;while(pos != string::npos){string::size_type p = s.find(delim, pos);if(p == string::npos){result.push_back(atoi(s.substr(pos).data()));break;}else {result.push_back(atoi(s.substr(pos, p - pos).data()));}pos = p + delim.size();}}
void split(string s, string delim, vecs& result){result.clear();string::size_type pos = 0;while(pos != string::npos){string::size_type p = s.find(delim, pos);if(p == string::npos){result.push_back(s.substr(pos));break;}else {result.push_back(s.substr(pos, p - pos));}pos = p + delim.size();}}
ll gcd(ll a, ll b){while(true){ll k = a % b;if(k == 0)return b;a = b;b = k;}}
ll comb(ll n, ll m){ll p=1;m=min(m,n-m);for(ll i=1;i<=m;i++){p*=n-i+1;p/=i;}return p;}

struct Info{
    int x,y,size;
    Info(int _x,int _y,int _s){
        x=_x;y=_y;size=_s;
    }
};

typedef pair<ll,ll> pl;
int dx[]={1,0,-1,0};
int dy[]={0,1,0,-1};

typedef vector<vector<vector<bool>>> vec3d;

int h,w;
int a,sx,sy;
int b,gx,gy;
bool fd[50][50]={0};
vec3d vis;

int main(void)
{
    cin>>h>>w;
    cin>>a>>sy>>sx;
    cin>>b>>gy>>gx;
    vis.resize(50);
    rep(i,h){
        string str=read<string>();
        vis[i].resize(50);
        rep(j,w){
            fd[i][j]=(str[j]=='*');
            vis[i][j].resize(1300);
        }
    }
    queue<Info> q;
    q.push(Info(sx,sy,a));
    vis[sy][sx][a]=true;
    while(!q.empty()){
        Info qt=q.front();
        q.pop();
        rep(i,4){
            int cx=qt.x+dx[i];
            int cy=qt.y+dy[i];
            if(cx<0||cx>=w||cy<0||cy>=h)continue;
            int size=qt.size+(fd[cy][cx]?1:-1);
            if(size<=0||size>1250)continue;
            if(vis[cy][cx][size])continue;
            q.push(Info(cx,cy,size));
            vis[cy][cx][size]=true;
        }
    }
    if(vis[gy][gx][b])write("Yes");
    else write("No");
    return 0;
}