import java.awt.Point;
import java.awt.Rectangle;
import java.awt.geom.Rectangle2D;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.*;
import java.util.Map.Entry;
import java.util.concurrent.ConcurrentSkipListSet;

import javax.swing.ImageIcon;

public class Main {
	static final long C =  1000000007;
	static final int CY = 1000000000;
	//long[] F;

	public void calc() {
		long fTime = System.currentTimeMillis();
		StringBuilder sb = new StringBuilder();
		BufferedInputStream bs = new BufferedInputStream(System.in);

		Scanner sc = new Scanner(bs);

		int h = sc.nextInt();
		int w = sc.nextInt();

		int f = sc.nextInt();
		Point fp = new Point(sc.nextInt(), sc.nextInt());
		g = sc.nextInt();
		gp = new Point(sc.nextInt(), sc.nextInt());

		map = new char[h][];

		for (int i=0; i < h; i++) {
			map[i] = sc.next().toCharArray();
		}

		memo = new boolean[h][w][1501];

		boolean ans = false;
		memo[fp.x][fp.y][f] = true;


		msd(fp.x, fp.y);


		ans = memo[gp.x][gp.y][g];
		System.out.println(ans?"Yes":"No");

	}
	//static int N = 1500;
	boolean[][][] memo ;
	char[][] map;
	int g;
	Point gp;

	void msd(int x, int y) {
		if (memo[gp.x][gp.y][g]) {
			return;
		}
		int nx = x+1,ny = y;
		check(x, y, nx, ny);
		nx = x-1;ny = y;
		check(x, y, nx, ny);
		nx = x;ny = y+1;

		check(x, y, nx, ny);
		nx = x;ny = y-1;

		check(x, y, nx, ny);

	}


	private void check(int x, int y, int nx, int ny) {
		int add;
		if (isIn(nx, ny)) {
			char nc = map[nx][ny];
			add = nc == '.'?-1:1;
			if (nc == map[x][y]) {
				boolean flag = false;
				if (nc == '.' ) {
					
					int max = 0;
					for (int i=1499;i >= 0; i--) {
						if (memo[x][y][i] ){
							max = i;
						}
					}
					for (int i=max-1;i >= 0; i-=2) {
						if (!memo[nx][ny][i]) {
							memo[nx][ny][i]= true; 
							flag = true;
						}
					}

				}else {
					int max = 1500;
					for (int i=0;i < 1500; i++) {
						if (memo[x][y][i] ){
							max = i;
						}
					}
					for (int i=max+1;i < 1500; i+=2) {
						if (!memo[nx][ny][i]) {
							memo[nx][ny][i]= true; 
							flag = true;
						}
					}
				}
				if (flag) {
					msd(nx, ny);
				}
			}

			for (int i=1; i < 1500; i++) {
				if (memo[x][y][i]) {
					if (!memo[nx][ny][i+add]) {
						memo[nx][ny][i+add] = true;
						msd(nx, ny);
					}
				}
			}

		}
	}


	boolean isIn(int x, int y) {
		return !(x < 0 || y < 0 || map.length <= x || map[0].length <= y);
	}






	public static void main(String[] args) {
		Main main = new Main();
		main.calc();

	}
}