#include <iostream>
#include <string>
using namespace std;

int main() {
  string s;
  cin >> s;

  int cnt = 1;
  for (int i = 0; i < s.size(); i++) {
    cnt += 2;
    switch (s[i]) {
    case '0':
    case '4':
    case '6':
    case '9':
      cnt += 1;
      break;
    case '8':
      cnt += 2;
    }
  }

  cout << cnt << endl;
  return 0;
}