#include<bits/stdc++.h>
#define REP(x,y,z) for(int x=y;x<=z;x++)
#define FORD(x,y,z) for(int x=y;x>=z;x--)
#define MSET(x,y) memset(x,y,sizeof(x))
#define FOR(x,y) for(__typeof(y.begin()) x=y.begin();x!=y.end();x++)
#define F first
#define S second
#define MP make_pair
#define PB push_back
#define SZ size()
#define M 55
#define MT make_tuple
void RI(){}
template<typename... T>
void RI( int& head, T&... tail ) {
    scanf("%d",&head);
    RI(tail...);
}
using namespace std;
typedef long long LL;
typedef tuple<int,int,int> T;
int n,m;
int dx[4]={1,-1,0,0},dy[4]={0,0,1,-1};

int sx,sy,sz;
int ex,ey,ez;
bool vis[M][M][3505];
char mp[M][M];
bool out(int x,int y)
{
	return x<=0 || y<=0 || x>n || y>m;
}
int main()
{
	int x,y,z;
	int nx,ny,nz;
	while(~scanf("%d %d",&n,&m))
	{
		RI(sz,sx,sy); sx++; sy++;
		RI(ez,ex,ey); ex++; ey++;
		REP(i,1,n) scanf("%s", mp[i]+1);

		MSET(vis,false);
		queue<T> q;
		vis[sx][sy][sz] = true;
		q.push(MT(sx,sy,sz));
		while(!q.empty())
		{
			tie(x,y,z) = q.front();
			q.pop();

			REP(i,0,3)
			{
				nx = x+dx[i];
				ny = y+dy[i];
				if(out(nx,ny)) continue;
				nz = z;
				if(mp[nx][ny]=='*') nz++;
				else nz--;

				if(nz<=0 || nz>3500) continue;

				if(vis[nx][ny][nz]) continue;

				vis[nx][ny][nz] = true;
				q.push(MT(nx,ny,nz));
			
			}
		}

		puts(vis[ex][ey][ez] ? "Yes":"No");
	}
	return 0;
}