from collections import deque

H, W, sx, sy = map(int, input().split())
sx -= 1
sy -= 1

S = [input() for _ in range(H)]

Q = int(input())

gx = [0] * Q
gy = [0] * Q
T = [0] * Q

for i in range(Q):
    gx[i], gy[i], T[i] = map(int, input().split())
    gx[i] -= 1
    gy[i] -= 1

dx = [1, 1, 0, -1, -1, -1, 0, 1]
dy = [0, 1, 1, 1, 0, -1, -1, -1]

INF = 10 ** 9 + 7

dist = [[[[INF] * 2 for _ in range(9)] for _ in range(W)] for _ in range(H)]
visited = [[[[False] * 2 for _ in range(9)] for _ in range(W)] for _ in range(H)]

dq = deque()
dq.appendleft((sx, sy, 8, 0))
dist[sx][sy][8][0] = 0

while dq:
    px, py, direction, parity = dq.popleft()

    if visited[px][py][direction][parity]:
        continue
    visited[px][py][direction][parity] = True

    for ndir in range(8):
        nx = px + dx[ndir]
        ny = py + dy[ndir]

        if not (0 <= nx < H and 0 <= ny < W):
            continue
        if S[nx][ny] == '#':
            continue

        if ndir == direction:
            if dist[nx][ny][ndir][parity] > dist[px][py][direction][parity]:
                dist[nx][ny][ndir][parity] = dist[px][py][direction][parity]
                dq.appendleft((nx, ny, ndir, parity))
        else:
            np = parity ^ 1
            if dist[nx][ny][ndir][np] > dist[px][py][direction][parity] + 1:
                dist[nx][ny][ndir][np] = dist[px][py][direction][parity] + 1
                dq.append((nx, ny, ndir, np))

for i in range(Q):
    ans = min(dist[gx[i]][gy[i]][d][T[i] % 2] for d in range(8))
    if ans <= T[i]:
        print("Yes")
    else:
        print("No")