# import sys
# input = sys.stdin.readline

H,W = map(int,input().split())
A = [list(map(int,input().split())) for i in range(H)]
sets = [[{(i,j)} for j in range(W)] for i in range(H)]
query = [[[] for i in range(W)] for i in range(H)]
Q = int(input())

for i in range(Q):
    rs,cs,rt,ct = map(lambda x: int(x)-1,input().split())
    query[rs][cs].append((rt,ct,i))
    query[rt][ct].append((rs,cs,i))

ans = [-1]*Q

def unite(ai,aj,bi,bj,cost):
    if sets[bi][bj] is sets[ai][aj]:
        return
    if len(sets[ai][aj]) < len(sets[bi][bj]):
        ai,bi = bi,ai
        aj,bj = bj,aj
    for (i,j) in sets[bi][bj]:
        for t in query[i][j]:
            if (t[0],t[1]) in sets[ai][aj]:
                ans[t[2]] = cost
    for (i,j) in sets[bi][bj]:
        sets[ai][aj].add((i,j))
        sets[i][j] = sets[ai][aj]

edges = []
for i in range(H):
    for j in range(W):
        for di,dj in ((0,1),(1,0)):
            if 0 <= i+di < H and 0 <= j+dj < W:
                edges.append((max(A[i][j],A[i+di][j+dj]),i,j,i+di,j+dj))

edges.sort()
for cost,ai,aj,bi,bj in edges:
    unite(ai,aj,bi,bj,cost)
print(*ans,sep="\n")