#!/usr/bin/ python3.8
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

H, W = map(int, readline().split())
A, Sx, Sy = map(int, readline().split())
B, Gx, Gy = map(int, readline().split())

M = ''.join(read().decode().split())

S = Sx * W + Sy
G = Gx * W + Gy
N = H * W

start = A * N + S
goal = B * N + G

stack = [start]
visited = set([start])
while stack:
    v = stack.pop()
    size, xy = divmod(v, N)
    x, y = divmod(xy, W)
    for dx, dy in ((1, 0), (0, 1), (-1, 0), (0, -1)):
        x1 = x + dx
        y1 = y + dy
        if not ((0 <= x1 < H) and (0 <= y1 < W)):
            continue
        xy1 = x1 * W + y1
        size1 = size - 1 + 2 * (M[xy1] == '*')
        if not size1:
            continue
        if size1 > 1500:
            continue
        v1 = size1 * N + xy1
        if v1 in visited:
            continue
        visited.add(v1)
        stack.append(v1)


print('Yes' if goal in visited else 'No')