import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.ArrayDeque;
import java.util.Arrays;
import java.util.Deque;
import java.util.Iterator;


public class Main_yukicoder323 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        Printer pr = new Printer(System.out);

        int h = sc.nextInt();
        int w = sc.nextInt();
        int a = sc.nextInt();
        int si = sc.nextInt();
        int sj = sc.nextInt();
        int b = sc.nextInt();
        int gi = sc.nextInt();
        int gj = sc.nextInt();

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

        if (Math.abs(a - b) % 2 != Math.abs(si - gi + sj - gj) % 2) {
        	pr.println("No");

        	sc.close();
        	pr.close();
        	return;
        }

        int[] di = {-1, 0, 1, 0};
        int[] dj = {0, 1, 0, -1};
        boolean flag1 = false;
        boolean flag2 = false;
        for (int i = 0; i < h; i++) {
        	for (int j = 0; j < w; j++) {
        		for (int k = 0; k < 2; k++) {
        			int ni = i + di[k];
        			int nj = j + dj[k];
        			if (ni < 0 || nj >= w) {
        				continue;
        			}

        			if (akichi[i][j] == akichi[ni][nj]) {
        				if (akichi[i][j] == '*') {
        					flag1 = true;
        				} else {
        					flag2 = true;
        				}
        			}
        		}
        	}
        }

        if (si == gi && sj == gj && a == b) {
        	pr.println("Yes");

        	sc.close();
        	pr.close();
        	return;
        }

        if (akichi[gi][gj] == '*' && b == 1) {
        	pr.println("No");

        	sc.close();
        	pr.close();
        	return;
        }

        boolean ret = false;
        if (flag1 && flag2) {
        	ret = isOk(akichi, di, dj, a, si, sj, b, gi, gj);
        } else if (flag1) {
        	int[][] yuki = getYuki(akichi, di, dj, a, si, sj, b, gi, gj, true);
        	if (yuki[gi][gj] <= b && yuki[gi][gj] > 0) {
        		ret = true;
        	}
        } else if (flag2) {
        	int[][] yuki = getYuki(akichi, di, dj, a, si, sj, b, gi, gj, false);
        	if (yuki[gi][gj] >= b) {
        		ret = true;
        	}
        } else {
        	int[][] yuki = getYuki(akichi, di, dj, a, si, sj, b, gi, gj, true);
        	if (yuki[gi][gj] == b) {
        		ret = true;
        	}
        }

        if (ret) {
        	pr.println("Yes");
        } else {
        	pr.println("No");
        }

        pr.close();
        sc.close();
    }

	private static int[][] getYuki(char[][] akichi, int[] di, int[] dj, int a, int si, int sj, int b, int gi, int gj, boolean min) {
		int h = akichi.length;
		int w = akichi[0].length;
		int[][] yuki = new int[h][w];
		if (min) {
			for (int i = 0; i < h; i++) {
				Arrays.fill(yuki[i], Integer.MAX_VALUE);
			}
		}

        Deque<Integer> qi = new ArrayDeque<Integer>();
        Deque<Integer> qj = new ArrayDeque<Integer>();
        qi.add(si);
        qj.add(sj);
        yuki[si][sj] = a;
        while (!qi.isEmpty()) {
        	int i = qi.remove();
        	int j = qj.remove();
        	for (int k = 0; k < di.length; k++) {
    			int ni = i + di[k];
    			int nj = j + dj[k];
    			if (ni < 0 || ni >= h || nj < 0 || nj >= w) {
    				continue;
    			}

    			int nyuki;
				if (akichi[ni][nj] == '*') {
					nyuki = yuki[i][j] + 1;
				} else {
					nyuki = yuki[i][j] - 1;
				}
				if (nyuki == 0) {
					continue;
				}

    			if (min && yuki[ni][nj] > nyuki) {
    				yuki[ni][nj] = nyuki;
    				qi.add(ni);
    				qj.add(nj);
    			} else if (!min && yuki[ni][nj] < nyuki) {
    				yuki[ni][nj] = nyuki;
    				qi.add(ni);
    				qj.add(nj);
    			}
        	}
        }

        return yuki;
	}

	private static boolean isOk(char[][] akichi, int[] di, int[] dj, int a, int si, int sj, int b, int gi, int gj) {
		int h = akichi.length;
		int w = akichi[0].length;
		int[][] yuki = new int[h][w];

        Deque<Integer> qi = new ArrayDeque<Integer>();
        Deque<Integer> qj = new ArrayDeque<Integer>();
        qi.add(si);
        qj.add(sj);
        yuki[si][sj] = a;
        while (!qi.isEmpty()) {
        	int i = qi.remove();
        	int j = qj.remove();
        	for (int k = 0; k < di.length; k++) {
    			int ni = i + di[k];
    			int nj = j + dj[k];
    			if (ni < 0 || ni >= h || nj < 0 || nj >= w) {
    				continue;
    			}

    			if (akichi[i][j] == '*' && akichi[ni][nj] == '*') {
    				return true;
    			}

    			int nyuki;
				if (akichi[ni][nj] == '*') {
					nyuki = yuki[i][j] + 1;
				} else {
					nyuki = yuki[i][j] - 1;
				}
				if (nyuki == 0) {
					continue;
				}

    			if (yuki[ni][nj] >= nyuki) {
    				continue;
    			}

    			yuki[ni][nj] = nyuki;
    			qi.add(ni);
    			qj.add(nj);
        	}
        }

        if (yuki[gi][gj] >= b) {
        	return true;
        }

		return false;
	}

	@SuppressWarnings("unused")
	private static class Scanner {
		BufferedReader br;
		Iterator<String> it;

		Scanner (InputStream in) {
			br = new BufferedReader(new InputStreamReader(in));
		}

		String next() throws RuntimeException  {
			try {
				if (it == null || !it.hasNext()) {
					it = Arrays.asList(br.readLine().split(" ")).iterator();
				}
				return it.next();
			} catch (IOException e) {
				throw new IllegalStateException();
			}
		}

		int nextInt() throws RuntimeException {
			return Integer.parseInt(next());
		}

		long nextLong() throws RuntimeException {
			return Long.parseLong(next());
		}

		float nextFloat() throws RuntimeException {
			return Float.parseFloat(next());
		}

		double nextDouble() throws RuntimeException {
			return Double.parseDouble(next());
		}

		void close() {
			try {
				br.close();
			} catch (IOException e) {
//				throw new IllegalStateException();
			}
		}
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}