#include<bits/stdc++.h>
using namespace std;

int main(){
	int a=0;
	string s;
	cin >> s;
	for(int i=0;i<s.size();i++){
		if(s[i]=='8') a+=5;
		else if(s[i]=='0'||s[i]=='4'||s[i]=='6'||s[i]=='9') a+=4;
		else a+=3;
	}
	cout << a-(s.size()-1) << endl;
	return 0;
}