#include <iostream>
#include <sstream>
#include <vector>
#include <algorithm>
#include <string>
#include <functional>
#include <numeric>
#include <ctype.h>
#include <cstdlib>
#include <string.h>
#include <cmath>
#include <cstdio>
#include <map>
#include <queue>
#include <utility>

using namespace std;

const int INF = 1000000007;
const double PI = acos(-1.0);
typedef long long ll;

int main()
{
	string str;
	int cnt = 0;
	cin >> str;
	for (int i = 0; i < str.length(); i++)
	{
		int tmp = str[i] - 48;

		switch (tmp)
		{
		case 1: case 2: case 3: case 5: case 7:
			cnt += 2;
			break;
		case 0:  case 4: case 6: case 9:
			cnt += 3;
			break;
		case 8:
			cnt += 4;
			break;
		}
	}
	cnt++;
	cout << cnt << endl;
}