text: // atcoder/abc164/C/main.cpp
  // author: @___Johniel
  // github: https://github.com/johniel/
  
  #include <bits/stdc++.h>
  
  #define each(i, c) for (auto& i : c)
  #define unless(cond) if (!(cond))
  
  using namespace std;
  
  template<typename P, typename Q> ostream& operator << (ostream& os, pair<P, Q> p) { os << "(" << p.first << "," << p.second << ")"; return os; }
  template<typename P, typename Q> istream& operator >> (istream& is, pair<P, Q>& p) { is >> p.first >> p.second; return is; }
  template<typename T> ostream& operator << (ostream& os, vector<T> v) { os << "("; for (auto& i: v) os << i << ","; os << ")"; return os; }
  template<typename T> istream& operator >> (istream& is, vector<T>& v) { for (auto& i: v) is >> i; return is; }
  template<typename T> ostream& operator << (ostream& os, set<T> s) { os << "#{"; for (auto& i: s) os << i << ","; os << "}"; return os; }
  template<typename K, typename V> ostream& operator << (ostream& os, map<K, V> m) { os << "{"; for (auto& i: m) os << i << ","; os << "}"; return os; }
  
  template<typename T> inline T setmax(T& a, T b) { return a = std::max(a, b); }
  template<typename T> inline T setmin(T& a, T b) { return a = std::min(a, b); }
  
  using lli = long long int;
  using ull = unsigned long long;
  using point = complex<double>;
  using str = string;
  template<typename T> using vec = vector<T>;
  
  constexpr array<int, 8> di({0, 1, -1, 0, 1, -1, 1, -1});
  constexpr array<int, 8> dj({1, 0, 0, -1, 1, -1, -1, 1});
  constexpr lli mod = 1e9 + 7;
  
  int main(int argc, char *argv[])
  {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.setf(ios_base::fixed);
    cout.precision(15);
  
    int n;
    while (cin >> n) {
      set<str> vis;
      for (int i = 0; i < n; ++i) {
        str s;
        cin >> s;
        vis.insert(s);
      }
      cout << vis.size() << endl;
    }
  
    return 0;
  }
  