#include<bits/stdc++.h>

using namespace std;

int ans = 0;

struct node {
    node *to[26] = {0};
    bool terminal = false;
};

node *root = new node();

void add(string &s) {
    auto v = root;
    for (auto c : s) {
        c -= 'a';
        if (!v->to[c])
            v->to[c] = new node();
        v = v->to[c];
    }
    if (!v->terminal)
        ans++, v->terminal = true;
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    while (n--) {
        string s;
        cin >> s;
        add(s);
    }
    cout << ans;
}