n = int(input())
g=n
s = 0
x0 = 0

while n > 0:
    x = n % 10
    if x % 4 == 0:
        s += x
    if x == 0:
        x0 += 1
    n = n // 10

if s != 0:
    print (s)
else:
    if g==0:
        print (0)
    else:
        print ('No')