#include <bits/stdc++.h>

using namespace std;

const int N = 500010;

int son[N][26], idx;

void insert(string &s)
{
    int p = 0;
    for (int i = s.size() - 1; i >= 0; -- i)
    {
        int u = s[i] - 'a';
        if (!son[p][u]) son[p][u] = ++idx;
        p = son[p][u];
    }
}
int main()
{
    int n;
    cin >> n;
    while (n--)
    {
        string s;
        cin >> s;
        insert(s);
    }
    cout << idx << '\n';
    return 0;
}