#include <bits/stdc++.h>
using namespace std;
#define int long long
int32_t main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
int W,H,K,L;
cin >> W >> H >> K >> L;
int xSt,ySt;
{
int t;
cin >> t >> xSt >> ySt >> t;
xSt++;
ySt++;
}
vector visited(H+2,vector<bool>(W+2));
for(int i=0;i<=H+1;i++)visited[i][0]=visited[i][W+1]=true;
for(int i=0;i<=W+1;i++)visited[0][i]=visited[H+1][i]=true;
int xEd,yEd;
vector<vector<int>> verticals(W+1);
for(int i=1;i<=W;i++)verticals[i].emplace_back(0);
for(int i=1;i<=W;i++)verticals[i].emplace_back(H+1);
vector<vector<int>> horizontals(H+1);
for(int i=1;i<=H;i++)horizontals[i].emplace_back(0);
for(int i=1;i<=H;i++)horizontals[i].emplace_back(W+1);
for(int i=1;i<=H;i++){
for(int j=1;j<=W;j++){
char x;cin>>x;
if(x=='X'){
visited[i][j]=true;
verticals[j].emplace_back(i);
horizontals[i].emplace_back(j);
}
if(x=='*'){
xEd = i;
yEd = j;
}
}
}
for(int i=1;i<=W;i++)sort(verticals[i].begin(),verticals[i].end());
for(int i=1;i<=H;i++)sort(horizontals[i].begin(),horizontals[i].end());
auto getVerticalRange = [&](int y,int x){
auto iter = lower_bound(verticals[x].begin(),verticals[x].end(),y);
assert(iter!=verticals[x].end());
assert(iter!=verticals[x].begin());
auto bef = iter-1;
return make_pair(*bef,*iter);
};
auto getHorizonalRange = [&](int x,int y){
auto iter = lower_bound(horizontals[x].begin(),horizontals[x].end(),y);
assert(iter!=horizontals[x].end());
assert(iter!=horizontals[x].begin());
auto bef = iter-1;
return make_pair(*bef,*iter);
};
function<void(int,int)> dfs = [&](int x,int y){
visited[x][y]=true;
auto myHori = getHorizonalRange(x,y);
auto myVeri = getVerticalRange(x,y);
if(!visited[x-1][y]){
auto t = getHorizonalRange(x-1,y);
t.first=max(t.first,myHori.first);
t.second=min(t.second,myHori.second);
int r = t.second-t.first-1;
if(r>=K)dfs(x-1,y);
}
if(!visited[x+1][y]){
auto t = getHorizonalRange(x+1,y);
t.first=max(t.first,myHori.first);
t.second=min(t.second,myHori.second);
int r = t.second-t.first-1;
if(r>=K)dfs(x+1,y);
}
if(!visited[x][y-1]){
auto t = getVerticalRange(x,y-1);
t.first=max(t.first,myVeri.first);
t.second=min(t.second,myVeri.second);
int r = t.second-t.first-1;
if(r>=L)dfs(x,y-1);
}
if(!visited[x][y+1]){
auto t = getVerticalRange(x,y+1);
t.first=max(t.first,myVeri.first);
t.second=min(t.second,myVeri.second);
int r = t.second-t.first-1;
if(r>=L)dfs(x,y+1);
}
};
dfs(xSt,ySt);
if(visited[xEd][yEd]){
cout << "YES\n";
} else cout << "NO\n";
}
