class dsu():
    n=1
    parent_or_size=[-1 for i in range(n)]
    def __init__(self,N):
        self.n=N
        self.parent_or_size=[-1 for i in range(N)]
    def merge(self,a,b):
        assert 0<=a<self.n, "0<=a<n,a={0},n={1}".format(a,self.n)
        assert 0<=b<self.n, "0<=b<n,b={0},n={1}".format(b,self.n)
        x=self.leader(a)
        y=self.leader(b)
        if x==y:
            return x
        if (-self.parent_or_size[x]<-self.parent_or_size[y]):
            x,y=y,x
        self.parent_or_size[x]+=self.parent_or_size[y]
        self.parent_or_size[y]=x
        return x
    def same(self,a,b):
        assert 0<=a<self.n, "0<=a<n,a={0},n={1}".format(a,self.n)
        assert 0<=b<self.n, "0<=b<n,b={0},n={1}".format(b,self.n)
        return self.leader(a)==self.leader(b)
    def leader(self,a):
        assert 0<=a<self.n, "0<=a<n,a={0},n={1}".format(a,self.n)
        if (self.parent_or_size[a]<0):
            return a
        self.parent_or_size[a]=self.leader(self.parent_or_size[a])
        return self.parent_or_size[a]
    def size(self,a):
        assert 0<=a<self.n, "0<=a<n,a={0},n={1}".format(a,self.n)
        return -self.parent_or_size[self.leader(a)]
    def groups(self):
        leader_buf=[0 for i in range(self.n)]
        group_size=[0 for i in range(self.n)]
        for i in range(self.n):
            leader_buf[i]=self.leader(i)
            group_size[leader_buf[i]]+=1
        result=[[] for i in range(self.n)]
        for i in range(self.n):
            result[leader_buf[i]].append(i)
        result2=[]
        for i in range(self.n):
            if len(result[i])>0:
                result2.append(result[i])
        return result2
H,W=map(int,input().split())
A=[list(map(int,input().split())) for i in range(H)]
C=set()
q=[]
Q=int(input())
for i in range(Q):
  a,b,c,d=map(int,input().split())
  q.append(((a-1)*W+b-1,(c-1)*W+d-1))
  C.add(i)
L=[[] for i in range(H*W+1)]
for i in range(H):
  for j in range(W):
    if i<H-1:
      x=A[i][j]
      y=A[i+1][j]
      z=max(x,y)
      L[z].append((i*W+j,(i+1)*W+j))
    if j<W-1:
      x=A[i][j]
      y=A[i][j+1]
      z=max(x,y)
      L[z].append((i*W+j,i*W+j+1))
result=[0]*Q
Z=dsu(H*W)
for x in range(1,H*W+1):
  if len(L[x])==0:
    continue
  for B in L[x]:
    pos1,pos2=B[:]
    Z.merge(pos1,pos2)
  l=[]
  for k in C:
    p1,p2=q[k][:]
    if Z.same(p1,p2)==True:
      l.append(k)
      result[k]=x
  for k in l:
    C.remove(k)
for i in range(Q):
  print(result[i])