#include <bits/stdc++.h>
using namespace std;
 
const int MAX = 1000005;
int trie[MAX][27]; // 0-25: litery, 26: koniec słowa
int uni = 2;       // 1 = korzeń
int ile = 0;       // liczba liści
 
pair<int,int> dfs(int v, int depth)
{
    vector<int> ends;
    int cost = 0;
 
    for(int c = 0; c < 26; ++c)
    {
        if (trie[v][c] == 0) continue;
        auto res = dfs(trie[v][c], depth + 1);
        cost += res.first;
        ends.push_back(res.second);
    }
 
    // liść — słowo końcowe
    if (ends.empty())
    {
        ile++;
        return {depth, depth};
    }
 
    sort(ends.begin(), ends.end());
 
    // dla wszystkich poza najgłębszym liściem
    // sprawdzamy, czy opłaca się teleportować zamiast wracać
    for (int i = 0; i + 1 < (int)ends.size(); ++i)
    {
        int backCost = ends[i] - depth; // cofanie
        int teleportCost = 1;           // powrót do korzenia
        if (teleportCost < backCost)
            cost -= backCost - teleportCost;
    }
 
    return {cost, ends.back()};
}
 
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
 
    int n;
    cin >> n;
    string slo;
 
    for(int i = 0; i < n; ++i)
    {
        int gdzie = 1;
        cin >> slo;
        for(char ch : slo)
        {
            int c = ch - 'a';
            if(trie[gdzie][c] == 0)
                trie[gdzie][c] = uni++;
            gdzie = trie[gdzie][c];
        }
        trie[gdzie][26]++; // koniec słowa
    }
 
    auto wynik = dfs(1, 0);
    cout << "Minimalny koszt przejścia: " << wynik.first + n + n - ile << "\n";
}
 

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