#include<bits/stdc++.h>
#include<iostream>
#include<cmath>
#include<iomanip>
#include<algorithm>
#include<cstdlib>
#include<cstring>
#include<vector>
#include<utility>
using namespace std;

#define ll long long
#define nl '\n'
#define sz(x) int(x.size())
#define all(x) x.begin(),x.end()
#define rall(s)  s.rbegin(), s.rend()
#define ceill(n, m) (((n) / (m)) + ((n) % (m) ? 1 : 0))
/*
███╗░░██╗███████╗░██████╗░███╗░░░███╗
████╗░██║██╔════╝██╔════╝░████╗░████║
██╔██╗██║█████╗░░██║░░██╗░██╔████╔██║
██║╚████║██╔══╝░░██║░░╚██╗██║╚██╔╝██║
██║░╚███║███████╗╚██████╔╝██║░╚═╝░██║
╚═╝░░╚══╝╚══════╝░╚═════╝░╚═╝░░░░░╚═╝

*/

void Fast_IO(){
    ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
    #ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout);
    #endif
}





void solve(){
  ll n; cin>>n;
set<string>st;
string s;
for(int i=0; i<n; i++){
getline(cin,s);
st.insert(s);
}
cout<<sz(st);





}

int main(){
    Fast_IO();
int t =1;
// cin>>t;
while(t--){
solve();
}
return 0;
}