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

int main(){
    int n,ans=0;
    cin >> n;
    while(n!=0){
        ans+=2;
        int tmp=n%10;
        if(tmp==0||tmp==4||tmp==6||tmp==9) ans++;
        if(tmp==8) ans+=2;
        n/=10;
    }
    cout << ans+1 << endl;

    return 0;
}