#include <bits/stdc++.h>
#define ll long long
#define pb push_back

using namespace std;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);

    int n;
    cin >> n;
    string arr[n];
    for(int i = 0; i < n; i++){
        cin >> arr[i];
        map<char, char> m;
        char last = 'a';
        for(int j = 0; j < arr[i].length(); j++){
            if(m.find(arr[i][j]) == m.end()){
                arr[i][j] = last;
                m[arr[i][j]] = last;
                last++;
            }
            else{
                arr[i][j] = m[arr[i][j]];
                }
        }
    }
        sort(arr, arr+n);
        ll tot = 0, re = 1;
        for(int i = 1; i < n; i++){
            cout << arr[i] << endl;
            if(arr[i] == arr[i-1]){ re++;}
            else {
                tot += ((re * (re-1))/2);
                re = 1;
            }
        }
        cout << tot;



}