codechef TEAMNAME

#include <bits/stdc++.h>
#define ll long long
#define ull unsigned long long int
#define ld long double
#define pb push_back
#define p_b pop_back
#define si stack<int>
#define sll stack<ll>
#define sc stack<char>
#define vi vector<int>
#define vll vector<ll>
#define mii map<int, int>
#define msi map<string, int>
#define mci map<char, int>
#define qc queue<char>
#define qi queue<int>
#define qll queue<ll>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int t;
    cin >> t;
    while(t--){
        int n;
        ld count = 0;
        cin >> n;
        msi r;
        map<char, vector<string>> s;

        for(int i = 0; i < n; i++){
            string f;
            cin >> f;
            s[f[0]].pb(f.substr(1, f.length()-1));
        }

        for(auto i = s.begin(); i != s.end(); i++){
            set<string> m;
            for(auto j = i; j != s.end(); j++){
                for(int p = 0; p < (i->second).size(); p++){
                    m.insert((i->second)[p]);
                }
                for(int p = 0; p < (j->second).size(); p++){
                    m.insert((j->second)[p]);
                }

                ld tmp = m.size();
                count += (tmp-(i->second).size())*(tmp-(j->second).size());
            }
        }
        cout << fixed << setprecision(0) << count*2 << "\n";
    }
    return 0;
}