from collections import deque
H,W,sx,sy = map(int,input().split())
S=[]
for _ in range(H):
    S.append(input())
dq = deque()
dq.append((sx-1,sy-1,0))
inf = 10**18
dp = [[[inf,inf] for _ in range(W)] for _ in range(H)]
t = [[[[False for _ in range(8)],[False for _ in range(8)]] for _ in range(W)] for _ in range(H)]
dp[sx-1][sy-1][0] = 0
dqcnt = 0
while dq:
    x,y,d = dq.popleft()
    dqcnt += 1
    for i in range(8):
        dx,dy = [[1,0],[0,1],[-1,0],[0,-1],[1,1],[-1,-1],[1,-1],[-1,1]][i]
        x_, y_ = x, y
        while True:
            x_ += dx
            y_ += dy
            if not (0<=x_<H and 0<=y_<W):
                break
            if S[x_][y_] == "#":
                break
            if dp[x_][y_][(d+1)%2] == inf:
                dq.append((x_,y_,d+1))
                dp[x_][y_][(d+1)%2] = d+1
            else:
                if t[x_][y_][(d+1)%2][i]:
                    break
                t[x_][y_][(d+1)%2][i] = True
Q=int(input())
ans = []
for _ in range(Q):
    gx,gy,T=map(int,input().split())
    if dqcnt == 1:
        ans.append("No")
        continue
    if dp[gx-1][gy-1][T%2] <= T:
        ans.append("Yes")
    else:
        ans.append("No")
for a in ans:
    print(a)