Ответ:

Проверенно

Объяснение:

a = list(map(int, input()))

b = list(map(int, input()))

c = list(map(int, input()))

if sum(a) == sum(b) and sum(a) == sum(c) and a[0] + b[0] + c[0] == a[1] + b[1] + c[1] and a[0] + b[0] + c[0] == a[2] + b[2] + c[2] and a[0] + b[1] + c[2] == c[0] + b[1] + a[2]:

print('ДА')

else:

print('НЕТ')