20250226

'''
def f(i,j) :
    global a, x,y   #a를 전역변수로 쓰겠다
    sum = 0
    for k in range(i, i + y):
        for t in range(j, j + x):
            if i + y > n or j + x > m:
                break
            else:
                sum += a[k][t]
    return sum


m, n, x, y=map(int, input().split())
a=[]
max=0
for i in range(n) :
    a.append(list(map(int, input().split())))
for i in range(n) :
    for j in range(m) :
        sum = f(i,j) # a[i][j]에서 가로x개, 세로y개의 합 리턴
        if max<sum :
            max=sum
print(max)


# print(10+20)
# print("10"+"20")

# def f(x, y) :
#     return x*y
#
# print(f(10,20))
# print(f("10","20"))
'''
def f(x, y, z) :
    global a
    sum=0
    for i in range(x-1, x+2) :
        for j in range(y-1, y+2) :
            if 0<=i<25 and 0<=j<9 :
                sum+=a[i][j]
    if z==1 :
        if sum==3 :
            a[x][y]=1
    else :
        if sum==2 or sum==3 :
            a[x][y]=1
a=[]
for i in range(25) :
    a.append(list(map(int, input().split())))
for i in range(25) :
    for j in range(25) :
        if a[i][j]==1 :
            f(i, j, 1)
        else :
            f(i, j, 2)
for i in range(25) :
    for j in range(25) :
        print(a[i][j], end=' ')
    print()