import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.BitSet;
import java.util.HashMap;
import java.util.PriorityQueue;
import java.util.Queue;
 
public class Main {
	public static void main(String[] args) throws NumberFormatException,
	IOException {Solve solve = new Solve();solve.solve();}
}
class Solve{
    int h, w;
    void solve() throws NumberFormatException, IOException{
        final ContestScanner in = new ContestScanner();
        Writer out = new Writer();
        h = in.nextInt();
        w = in.nextInt();
        int a = in.nextInt();
        int sy = in.nextInt();
        int sx = in.nextInt();
        int b = in.nextInt();
        int gy = in.nextInt();
        int gx = in.nextInt();
        char[][] map = new char[h][];
        for(int i=0; i<h; i++){
            map[i] = in.nextToken().toCharArray();
        }
        BitSet used = new BitSet(h*w*1111);
        Queue<Integer> qu = new PriorityQueue<>();
        final int[] dx = {1, 0, -1, 0};
        final int[] dy = {0, 1, 0, -1};
        qu.add(id(sy, sx, a));
        final int mask = (1<<6)-1;
        while(!qu.isEmpty()){
        	int p = qu.poll();
            if(used.get(p)) continue;
            used.set(p);
            final int s = p>>12;
        	final int y = (p>>6)&mask;
        	final int x = p&mask;
//        	System.out.println("("+x+","+y+","+s+")");
            for(int i=0; i<4; i++){
                final int ny = dy[i]+y;
                final int nx = dx[i]+x;
                if(out(ny, nx)) continue;
//                if(map[ny][nx]=='.'&&s==1) continue;
                int ns = s+(map[ny][nx]=='.'?-1:1);
                if(ns<=0||ns>=1111) continue;
                qu.add(id(ny, nx, ns));
            }
        }

        if(used.get(b<<12|gy<<6|gx)){
            System.out.println("Yes");
            return;
        }
        System.out.println("No");
    }
    
    int id(int y, int x, int s){
    	return s<<12|y<<6|x;
    }
    
    int dist(int x1, int y1, int x2, int y2){
        return Math.abs(x1-x2) + Math.abs(y1-y2);
    }
    
    boolean out(int y, int x){
        return y<0||y>=h||x<0||x>=w;
    }
}
//
//class Pos implements Comparable<Pos>{
//    int id, x, y, s;
//    Pos(int x, int y, int s){
//        this.x = x;
//        this.y = y;
//        this.s = s;
//        id = y<<6|x;
//    }
//    @Override
//    public int compareTo(Pos o) {
//        return o.s-s;
//    }
//    @Override
//    public String toString() {
//        return "("+x+","+y+","+s+")";
//    }
//}

class MultiSet<T> extends HashMap<T, Integer>{
	@Override
	public Integer get(Object key){return containsKey(key)?super.get(key):0;}
	public void add(T key,int v){put(key,get(key)+v);}
	public void add(T key){put(key,get(key)+1);}
	public void sub(T key){
		final int num = get(key);
		if(num==1) remove(key);
		else put(key, num-1);
	}
}
class Timer{
	long time;
	public void set(){time = System.currentTimeMillis();}
	public long stop(){return System.currentTimeMillis()-time;}
}
class Writer extends PrintWriter{
	public Writer(String filename) throws IOException
	{super(new BufferedWriter(new FileWriter(filename)));}
	public Writer() throws IOException{super(System.out);}
}
class ContestScanner {
	private BufferedReader reader;
	private String[] line;
	private int idx;
	public ContestScanner() throws FileNotFoundException 
	{reader = new BufferedReader(new InputStreamReader(System.in));}
	public ContestScanner(String filename) throws FileNotFoundException
	{reader = new BufferedReader(new InputStreamReader(new FileInputStream(filename)));}
	public String nextToken() throws IOException {
		if (line == null || line.length <= idx) {
			line = reader.readLine().trim().split(" ");
			idx = 0;
		}
		return line[idx++];
	}
	public String readLine() throws IOException{return reader.readLine();}
	public long nextLong() throws IOException, NumberFormatException
	{return Long.parseLong(nextToken());}
	public int nextInt() throws NumberFormatException, IOException
	{return (int) nextLong();}
	public double nextDouble() throws NumberFormatException, IOException 
	{return Double.parseDouble(nextToken());}
}