```pyarray = []     # Replace with the huge 2-D arrayx = []
isEven = lambda x: x % 2 == 0
for j in range(1, len(array)-1):    for i in range(1, len(array[j])-1):        if isEven(array[j][i+1]) and isEven(array[j][i-1]) and isEven(array[j+1][i]) and isEven(array[j-1][i]) \            and isEven(array[j+1][i+1]) and isEven(array[j-1][i-1]) and isEven(array[j-1][i+1]) and isEven(array[j+1][i-1]):            x.append(array[j][i])
print('darkCTF{' + ''.join(map(chr, x))[::-1].replace('FLaGIS', '') + '}')```