import sys
input = sys.stdin.readline
from collections import deque

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

S=[input().strip() for i in range(H)]

DP0=[[[1<<60]*8 for j in range(W)] for i in range(H)]
DP1=[[[1<<60]*8 for j in range(W)] for i in range(H)]
sx-=1
sy-=1

Q=deque()
for i in range(8):
    DP0[sx][sy][i]=0
    Q.append((sx,sy,0,i))

while Q:
    #print(Q)
    x,y,kai,com=Q.popleft()

    if kai%2==0:
        for z,w,nc in [(x+1,y,0),(x-1,y,1),(x,y+1,2),(x,y-1,3),(x+1,y+1,4),(x+1,y-1,5),(x-1,y+1,6),(x-1,y-1,7)]:
            if 0<=z<H and 0<=w<W and S[z][w]!="#":
                if com==nc:
                    if DP0[z][w][nc]>kai and kai>0:
                        DP0[z][w][nc]=kai
                        Q.appendleft((z,w,kai,nc))
                else:
                    if DP1[z][w][nc]>kai+1:
                        DP1[z][w][nc]=kai+1
                        Q.append((z,w,kai+1,nc))
    else:
        for z,w,nc in [(x+1,y,0),(x-1,y,1),(x,y+1,2),(x,y-1,3),(x+1,y+1,4),(x+1,y-1,5),(x-1,y+1,6),(x-1,y-1,7)]:
            if 0<=z<H and 0<=w<W and S[z][w]!="#":
                if com==nc:
                    if DP1[z][w][nc]>kai and kai>0:
                        DP1[z][w][nc]=kai
                        Q.appendleft((z,w,kai,nc))
                else:
                    if DP0[z][w][nc]>kai+1:
                        DP0[z][w][nc]=kai+1
                        Q.append((z,w,kai+1,nc))

c=0
for i in range(H):
    for j in range(W):
        for k in range(8):
            if DP0[i][j][k]!=1<<60:
                c=max(c,DP0[i][j][k])
            if DP1[i][j][k]!=1<<60:
                c=max(c,DP1[i][j][k])

Q=int(input())

for tests in range(Q):
    gx,gy,T=list(map(int,input().split()))
    gx-=1
    gy-=1

    if c==0:
        print("No")
        continue

    if T%2==0:
        xx=min(DP0[gx][gy][k] for k in range(8))
        if xx==1<<60:
            print("No")
        else:
            if xx<=T:
                print("Yes")
            else:
                print("No")

    else:
        xx=min(DP1[gx][gy][k] for k in range(8))
        if xx==1<<60:
            print("No")
        else:
            if xx<=T:
                print("Yes")
            else:
                print("No")