#include<iostream>
#include<string>
#include<algorithm>

using namespace std;

typedef long long ll;

int ctoi(const char);

int main() {

	string str;
	ll sum1 = 0,sum2=0;
	int ana = 0;
	cin >> str;
	for (char c:str) {
		int buff = ctoi(c);
		if (buff == 0 || buff == 4 || buff == 6 || buff == 9)ana++;
		else if (buff == 8)ana += 2;
	}

	sum1 = 2 * (ana + 1) + str.size();
	sum2 = 2 * str.size() + ana + 1;


	cout <<min(sum1,sum2)<< endl;
	
	return 0;
}

int ctoi(const char c) {
	if ('0' <= c && c <= '9') return (c - '0');
	return -1;
}