import sys

def solve():
    n = input()

    ans1 = len(n) * 2 + 1

    for ch in n:
        if ch in '0469':
            ans1 += 1
        elif ch == '8':
            ans1 += 2

    ans2 = 1

    for ch in n:
        if ch in '0469':
            ans2 += 1
        elif ch == '8':
            ans2 += 2

    ans2 *= 2
    ans2 += len(n)

    ans = min(ans1, ans2)

    print(ans)

if __name__ == '__main__':
    solve()