fn = [0,1]
sum = 0
n = 1
while fn[n] < 4000000:
    n = n + 1
    fn.append(fn[n - 2] + fn[n - 1])
    if fn[n] % 2 == 0: #新しいフィボナッチの項が偶数ならば
        print(fn[n])
        sum = sum + fn[n]

print(fn)
print(sum)