a = list(map(int, input().split()))
num = 0
for k in a:
    if k % 3 == 0 and k % 5 == 0:
        num += 8
    elif k % 3 == 0:
        num += 4
    elif k % 5 == 0:
        num += 4
    else:
        s = k
        while s > 0:
            s = s // 10
            num += 1

print(num)