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

int main(){
    int n,ans=0,ans2=0;
    cin >> n;
    if(n==0){cout<<4<<endl;return 0;}
    while(n!=0){
        ans++;ans2+=2;
        int tmp=n%10;
        if(tmp==0||tmp==4||tmp==6||tmp==9){ans+=2;ans2++;}
        if(tmp==8){ans+=4;ans2+=2;}
        n/=10;
    }
    if(ans+2<ans2+1) cout << ans+2 << endl;
    else cout << ans2+1 << endl;

    return 0;
}