from collections import *

H, W = map(int, input().split())
A, sx, sy = map(int, input().split())
B, gx, gy = map(int, input().split())
G = []
for i in range(H):
    G.append(list(input()))

Q = deque()
Q.append((sx, sy, A))
dx = [1, 0, -1, 0]
dy = [0, 1, 0, -1]
M = 1200
S = set()
S.add((sx, sy, A))
while Q:
    px, py, c = Q.popleft()
    for k in range(4):
        x = px + dx[k]
        y = py + dy[k]
        if x < 0 or x > H - 1 or y < 0 or y > W - 1:
            continue
        if G[x][y] == "*":
            nc = c + 1  
        else:
            nc = c - 1
        if nc < 0 or nc >= M:
            continue
        if (x, y, nc) in S:
            continue
        S.add((x, y, nc))
        Q.append((x, y, nc))
        if B == nc and x == gx and y == gy:
            print("Yes")
            exit()

print("No")