#include <string>
#include <vector>
#include <list>
#include <cmath>
#include <algorithm>
#include <map>
#include <set>
#include <iostream>
#include <cstdio>
#include <cstdlib>
using namespace std;

class TCPhoneHome {
  public:
    long long validNumbers(int digits, vector <string> specialPrefixes);
};

long long TCPhoneHome::validNumbers(int digits, vector <string> sp)
{
  return 0;
}