using System;
using System.Linq;
using System.Text;
using System.Collections.Generic;
using STR = System.String;
using INT = System.Int32;
using DEC = System.Double;

class Program
{
    public static IO IO = new IO();
    static void Main(string[] args)
    {
        INT[] hw = IO.I(' ');
        INT[] a = IO.I(' ');
        INT[] b = IO.I(' ');
        STR[] s = IO.S(hw[0]);
        PAIR<POINT<INT>, INT> c = new PAIR<POINT<INT>, INT>(new POINT<INT>(b[0], b[1], b[2]), 0);
        BFSPOINT<INT> q = new BFSPOINT<INT>(1001 * hw[0] * hw[1], 5000, hw[0], hw[1], 1, 0, 0);
        string o = "No";
        q.PUSH(a[0], a[1], a[2], 0);
        while (q.SIZE() != 0)
        {
            PAIR<POINT<INT>, INT> x = q.POP();
            if (x.SAME(c)) { o = "Yes"; break; }
            if (x.KEY.Y - 1 >= 0)
            {
                if (s[x.KEY.Y - 1][x.KEY.Z] == '*') { q.PUSH(x.KEY.X + 1, x.KEY.Y - 1, x.KEY.Z, x.VALUE + 1); }
                else { q.PUSH(x.KEY.X - 1, x.KEY.Y - 1, x.KEY.Z, x.VALUE + 1); }
            }
            if (x.KEY.Y + 1 < hw[0])
            {
                if (s[x.KEY.Y + 1][x.KEY.Z] == '*') { q.PUSH(x.KEY.X + 1, x.KEY.Y + 1, x.KEY.Z, x.VALUE + 1); }
                else { q.PUSH(x.KEY.X - 1, x.KEY.Y + 1, x.KEY.Z, x.VALUE + 1); }
            }
            if (x.KEY.Z - 1 >= 0)
            {
                if (s[x.KEY.Y][x.KEY.Z - 1] == '*') { q.PUSH(x.KEY.X + 1, x.KEY.Y, x.KEY.Z - 1, x.VALUE + 1); }
                else { q.PUSH(x.KEY.X - 1, x.KEY.Y, x.KEY.Z - 1, x.VALUE + 1); }
            }
            if (x.KEY.Z + 1 < hw[1])
            {
                if (s[x.KEY.Y][x.KEY.Z + 1] == '*') { q.PUSH(x.KEY.X + 1, x.KEY.Y, x.KEY.Z + 1, x.VALUE + 1); }
                else { q.PUSH(x.KEY.X - 1, x.KEY.Y, x.KEY.Z + 1, x.VALUE + 1); }
            }
        }
        IO.W(o);
        IO.F();
    }
}
public class BFSPOINT<T> : QUEUE<PAIR<POINT<INT>, T>>
{
    private bool[,,] f;
    private INT MAXX, MAXY, MAXZ, MINX, MINY, MINZ;
    public BFSPOINT(INT qmax, INT maxX, INT maxY, INT maxZ, INT minX = 0, INT minY = 0, INT minZ = 0) : base(qmax)
    {
        MAXX = maxX; MAXY = maxY; MAXZ = maxZ; MINX = minX; MINY = minY; MINZ = minZ;
        f = new bool[MAXX - MINX, MAXY - MINY, MAXZ - MINZ];
    }
    public void PUSH(INT x, INT y, INT z, T value) { PUSH(new PAIR<POINT<INT>, T>(new POINT<INT>(x, y, z), value)); }
    public override void PUSH(PAIR<POINT<INT>, T> v)
    {
        POINT<INT> k = v.KEY;
        INT x = k.X;
        INT y = k.Y;
        INT z = k.Z;
        if (x >= MINX && x < MAXX && y >= MINY && y < MAXY && z >= MINZ && z < MAXZ && !f[x - MINX, y - MINY, z - MINZ])
        {
            f[x - MINX, y - MINY, z - MINZ] = true; base.PUSH(v);
        }
    }
}
public class POINT<T> : IEquatable<POINT<T>> where T : IEquatable<T>
{
    public T X;
    public T Y;
    public T Z;
    public POINT(T x, T y, T z) { X = x; Y = y; Z = z; }
    public bool SAME(POINT<T> b) { return Equals(b); }
    public bool Equals(POINT<T> b) { return X.Equals(b.X) && Y.Equals(b.Y) && Z.Equals(b.Z); }
}
public class QUEUE<T>
{
    protected INT m;
    private INT s, e, c;
    private T[] q;
    public QUEUE(INT max) { m = max; q = new T[m]; CLEAR(); }
    public void CLEAR() { e = 0; s = 0; c = 0; }
    public INT SIZE() { return c; }
    public T TOP() { return q[0]; }
    public T POP() { T r = q[s++]; s %= m; c--; return r; }
    public virtual void PUSH(T v) { q[e++] = v; e %= m; c++; }
    public bool EMPTY() { return SIZE() == 0; }
}
public class PAIR<T, U> : IEquatable<PAIR<T, U>> where T : IEquatable<T>
{
    public T KEY;
    public U VALUE;
    public PAIR(T key, U value) { KEY = key; VALUE = value; }
    public bool SAME(PAIR<T, U> b) { return Equals(b); }
    public bool Equals(PAIR<T, U> b) { return KEY.Equals(b.KEY); }
}
public class IO
{
    private const int WMAX = 1000;
    private StringBuilder SB = new StringBuilder();
    private T R<T>(Func<STR, T> f) { return f(Console.ReadLine()); }
    private T[] R<T>(Func<STR, T> f, char c) { return S().Split(c).Select(f).ToArray(); }
    private T[] R<T>(Func<STR, T> f, INT l) { T[] r = new T[l]; for (INT i = 0; i < l; i++) { r[i] = R(f); } return r; }
    private T[][] R<T>(Func<STR, T> f, INT l, char c) { T[][] r = new T[l][]; for (INT i = 0; i < l; i++) { r[i] = R<T>(f, c); } return r; }
    private void W<T>(Func<T, STR> f, T v, bool lf = true) { SB.Append(f(v)); if (lf) { SB.Append('\n'); } if (SB.Length >= WMAX) { F(); } }
    public STR S() { return R(s => s); }
    public STR[] S(char c) { return R(s => s, c); }
    public STR[] S(INT l) { return R(s => s, l); }
    public STR[][] S(INT l, char c) { return R(s => s, l, c); }
    public INT I() { return R(INT.Parse); }
    public INT[] I(char c) { return R(INT.Parse, c); }
    public INT[] I(INT l) { return R(INT.Parse, l); }
    public INT[][] I(INT l, char c) { return R(INT.Parse, l, c); }
    public DEC D() { return R(DEC.Parse); }
    public DEC[] D(char c) { return R(DEC.Parse, c); }
    public DEC[] D(INT l) { return R(DEC.Parse, l); }
    public DEC[][] D(INT l, char c) { return R(DEC.Parse, l, c); }
    public void W(object s, bool lf = true) { W(v => v.ToString(), s, lf); }
    public void F() { Console.Write(SB); SB.Length = 0; }
}