#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
#include <queue>
#include <map>
#include <cmath>
#include <iomanip>
#include <set>
#include <cstdio>

using namespace std;

string s;
int ans = 0;

bool is_prime(long long x) {
  if (x == 2 || x == 3 || x == 5 || x == 7) {
    return true;
  }
  if (x == 1) {
    return false;
  }
  for (long long j = 2; j * j <= x; j++) {
    if (x % j == 0) {
      return false;
    }
  }
  return true;
}

void dfs(long long now , long long sum , int id) {
  if (id == s.size()) {
    if (is_prime(now + sum)) ans++;
    return;
  }
  dfs(now * 10 + s[id] - '0' , sum , id + 1);
  dfs(s[id] - '0' , sum + now , id + 1);
  return;
}

int main() {
  cin >> s;
  dfs(0,0,0);
  cout << ans / 2 << endl;
  return 0;
}