import sys

sys.setrecursionlimit(10 ** 6)
stdin = sys.stdin

ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
ns = lambda: stdin.readline().strip()
nsa = lambda: list(map(str, stdin.readline().split()))
ntp = lambda: tuple(map(int, stdin.readline().split()))
mod = 10 * 9 + 7
inf = 2 << 90

S = list(ns())
n = len(S)

n1 = ('0', '4', '6', '9')
n2 = ('8')

ans = n * 2 + 1

for s in S:
    if s in n1:
        ans += 1
    if s in n2:
        ans += 2

print(ans)