#include <iostream>
#include <vector>

std::vector<std::vector<long long> > go(2);
std::vector<long long> poss(2);
long long dimension = 1;


long long add(const std::string &str) {
    long long curr = 1;
    long long var = 0;
    for (auto ch : str) {
        ch = ch - 'a';
        if (curr != 1 && poss[curr] == 1)
            var++;
        else
            var = 0;
        if (go[curr][ch]) {
            curr = go[curr][ch];
        } else {
            var = 0;
            dimension++;
            go.push_back(std::vector<long long>(27, 0));
            poss.push_back(0);
            go[curr][ch] = dimension;
            poss[curr]++;
            curr = dimension;
        }
    }

    if (poss[curr] != 0)
        var = 0;
    return str.size() - var;
}

int main() {
    poss[1] = 0;
    go[1] = (std::vector<long long>(27, 0));
    long long n;
    std::cin >> n;
    long long res = 0;
    std::string str;
    for (long long i = 0; i < n; ++i) {
        std::cin >> str;
        res += add(str);
    }

    std::cout << res << '\n';
    return 0;

}