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

int main(){
	cin.tie(0),ios::sync_with_stdio(false);
	string n; cin>>n;
	int ans=2;
	for(auto&&i:n){
		if(i=='8')ans+=3;
		else if(i=='0'||i=='4'||i=='6'||i=='9')ans+=2;
		else ans+=1;
	}
	cout<<ans<<"\n"s;
}