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 qi = new ArrayDeque(); Deque qj = new ArrayDeque(); 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 qi = new ArrayDeque(); Deque qj = new ArrayDeque(); 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 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); } } }