from collections import deque

move = [[-1,-1],[-1,0],[-1,1],[0,-1],[0,1],[1,-1],[1,0],[1,1]]

h,w,sy,sx = list(map(int,input().split()))
a = [list(input()) for i in range(h)]
s = [[[[0,0] for i in range(8)] for u in range(w)] for j in range(h)]
sy,sx = sy-1,sx-1

d = deque([(sy,sx,0,-1)])

while len(d):
    y,x,z,c = d.popleft()
    
    for i in range(8):
        Y,X = move[i]
        if 0 <= y+Y < h and 0 <= x+X < w and a[y+Y][x+X] == '.' and s[y+Y][x+X][i][z^1] == 0:
            s[y+Y][x+X][i][z^1] = s[y][x][c][z]+1
            d.append((y+Y,x+X,z^1,i))
        
        if 0 <= y+Y < h and 0 <= x+X < w and a[y+Y][x+X] == '.' and s[y+Y][x+X][i][z] == 0 and c == i:
            s[y+Y][x+X][c][z] = s[y][x][c][z]
            d.append((y+Y,x+X,z,i))

q = int(input())

for _ in range(q):
    y,x,t = list(map(int,input().split()))
    y,x = y-1,x-1
    ans = "No"
    
    for i in range(8):
        if 0 < s[y][x][i][t%2] <= t:
            ans = "Yes"
            break
    
    print(ans)