#!/usr/bin/env python3
#coding:utf-8

import math
import string
import random
import heapq
from sys import stdin
# import numpy as np
# from matplotlib import pyplot as plt
	
def add(c):
	if c=='0':
		return 1
	elif c=='4':
		return 1
	elif c=='6':
		return 1
	elif c=='8':
		return 2
	elif c=='9':
		return 1
	else :
		return 0

def main():
	read=stdin.readline

	#edit here!
	s=read()
	n=len(s)
	n-=1
	ans=n*2+1
	for i in range(n):
		ans+=add(s[i])
	res=n+2
	for i in range(n):
		res+=2*add(s[i])
	if ans>res:
		ans=res
	print(ans)

if __name__ == '__main__':
	main()