from collections import deque
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)
DX = (-1, 0, 1, 0, -1, -1, 1, 1)
DY = (0, 1, 0, -1, -1, 1, -1, 1)
DX = DX[:4]
DY = DY[:4]

H, W = map(int, input().split())
A, sx, sy = map(int, input().split())
B, gx, gy = map(int, input().split())
sx += 1
sy += 1
gx += 1
gy += 1
G = [[0] * (W + 2) for _ in range(H + 2)]
for i in range(1, H + 1):
    for j, x in enumerate(input().rstrip(), 1):
        if x == "*":
            G[i][j] = 1
        else:
            G[i][j] = -1

U = 1000 + 50 * 50
dist = [[[-1] * (U + 1) for _ in range(W + 2)] for _ in range(H + 2)]
dist[sx][sy][A] = 0
que = deque([(sx, sy, A)])
while que:
    x, y, a = que.popleft()
    d = dist[x][y][a]
    for dx, dy in zip(DX, DY):
        nx = x + dx
        ny = y + dy
        if G[x][y] == 1 and a < U and dist[nx][ny][a + 1] == -1:
            dist[nx][ny][a + 1] = d + 1
            que.append((nx, ny, a + 1))
        if G[x][y] == -1 and a and dist[nx][ny][a - 1] == -1:
            dist[nx][ny][a - 1] = d + 1
            que.append((nx, ny, a - 1))

if dist[gx][gy][B] == -1:
    print("No")
else:
    print("Yes")