I=input;M=lambda:map(int,I().split());h,w,x,y=M();w+=1
b='#'*-~w;a=b+'#'.join(map(I,['']*h))+b
d=[0]*len(a)*2;q=[(x*w+y)*2]
for z in q:
 for j in~w,-w,1-w,-1,1,w-1,w,w+1:
  v=z//2+j
  while a[v]>'#':
   if d[k:=v*2+~z%2]<1:d[k]=d[z]+1;q+=k,
   v=d[k^1]<1and v+j
for _ in' '*int(I()):
 x,y,t=M();print(['No','Yes'][0<d[(x*w+y)*2+t%2]<=t])