class Counter:
    def __init__(self):
        self.d = { "0": 1, "4": 1, "6": 1, "8": 2, "9": 1 }
        self.n = 1

    def __call__(self, s):
        for c in s:
            if c in self.d:  
                self.n += self.d[c]

        self.n += len(s)*2

        print(self.n)

def main():
    s = input()
    counter = Counter()
    counter(s)

main()