#include<bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
  string s;
  cin>>s;
  int ans=s.length()*2+1;
  for(int i=0;i<(int)s.size();i++){
    if(s[i]=='0') ans+=1;
    if(s[i]=='4') ans+=1;
    if(s[i]=='6') ans+=1;
    if(s[i]=='8') ans+=2;
    if(s[i]=='9') ans+=1;
  }
  cout<<ans<<endl;
  return 0;
}