H, W = map(int, raw_input().split())
A, Sr, Sc = map(int, raw_input().split())
B, Gr, Gc = map(int, raw_input().split())

if (abs(Sr-Gr)+abs(Sc-Gc))%2 != abs(A-B)%2:
    print 'No'
    exit()

board = [raw_input() for _ in xrange(H)]
dr = [0, 0, 1, -1]
dc = [1, -1, 0, 0]

if board[Gr][Gc] == '*' and B == 1:
    for i in xrange(4):
        nr, nc = Gr+dr[i], Gc+dc[i]
        if 0 <= nr < H and 0 <= nc < W and board[nr][nc] == '*':
            break
    else:
        print 'No'
        exit()

if abs(A-B) >= abs(Sr-Gr)+abs(Sc-Gc):
    print 'Yes'
    exit()

goals = set()
for i in xrange(H):
    for j in xrange(W):
        if (i, j) in goals:
            continue
        if board[i][j] == '.':
            continue
        for k in xrange(4):
            nr, nc = i+dr[k], j+dr[k]
            if 0 <= nr < H and 0 <= nc < W and board[nr][nc] == '*':
                goals.add((i, j))
                goals.add((nr, nc))

reachable = {}
stack = [((Sr, Sc), A)]
while len(stack) > 0:
    node, size = stack.pop()
    if node in goals and size >= 1:
        print 'Yes'
        exit()
    if node in reachable and reachable[node] >= size:
        continue
    reachable[node] = size
    for i in xrange(4):
        nr, nc = node[0]+dr[i], node[1]+dc[i]
        if nr < 0 or nr >= H or nc < 0 or nc >= W:
            continue
        new_size = size + 1 if board[nr][nc] == '*' else size - 1
        if new_size <= 0:
            continue
        if (nr, nc) in reachable and reachable[(nr, nc)] >= new_size:
            continue
        stack.append(((nr, nc), new_size))
print 'No'