/*
[templates]: 
duipai
spjdp
compre
addhis
*/
#include<bits/stdc++.h>
using namespace std;
#define int long long
//use ll instead of int.
#define f(i, a, b) for(int i = (a); i <= (b); i++)
#define cl(i, n) i.clear(),i.resize(n);
#define endl '\n'
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int inf = 1e9;
//#define cerr if(false)cerr
//#define freopen if(false)freopen
mt19937 rng(time(0)); 
int rnd(int l, int r) {return rng() % (r-l+1) + l; }
#define watch(x) cerr  << (#x) << ' '<<'i'<<'s'<<' ' << x << endl
void pofe(int number, int bitnum) {
    string s; f(i, 0, bitnum) {s += char(number & 1) + '0'; number >>= 1; } 
    reverse(s.begin(), s.end()); cerr << s << endl; 
    return;
}
template <typename TYP> void cmax(TYP &x, TYP y) {if(x < y) x = y;}
template <typename TYP> void cmin(TYP &x, TYP y) {if(x > y) x = y;}
//调不出来给我对拍！
//use std::array.
map<int, int> mp;
int base = 202009, mod = 1145141979; int powp[1000010];
struct PAM {
    int cnt, lst, n; string s; int tot; 
    vector<int> fail; vector<array<int, 26>> ed; vector<int> len; vector<int> pre; 
    PAM() {
        cnt = 1; lst = 1; n = 0; fail.push_back({1}); fail.push_back({1}); 
        ed.push_back({0}); ed.push_back({0}); len.push_back(0); 
        len.push_back(-1); pre.push_back(0); 
        tot = 0; 
    }
    int getfa(int x) {
        while(s[n] != s[n - len[x] - 1]) x = fail[x]; 
        return x; 
    }
    int hx(int l, int r) {
        return (pre[r] - pre[l - 1] * powp[r - l + 1] % mod + mod) % mod; 
    }
    void input(int l, int leng) {
        int r = l + leng - 1; 
        //tot += t.size(); 
        int tt = hx(l, r); //cerr << l << " " << r << " " << s.substr(l, r - l + 1) << " " << tt << endl; 
     //   cerr << t << endl; 
        if(mp.count(tt)) mp[tt] ++; else mp[tt] = 1; 
    }
    void insert(char ch) {
        n++; int p = getfa(lst); pre.push_back(((pre[n-1] * base) + s[n]) % mod); 
        if(!ed[p][ch - 'a']) {
            ++cnt; fail.push_back(0); ed.push_back({0}); len.push_back(len[p]+2);
            int np = getfa(fail[p]); fail[cnt] = ed[np][ch - 'a']; 
            ed[p][ch - 'a'] = cnt; 
            if(len[cnt] % (len[cnt] - len[fail[cnt]]) == 0) {
                input(n - len[cnt] + 1, len[cnt] - len[fail[cnt]]); 
            }
            else {
                input(n - len[cnt] + 1, len[cnt]);
            }
        } 
        
        lst = ed[p][ch - 'a']; //tot += len[lst] - len[fail[lst]]; 
      //  cerr << "n = " << n << ", lst = " << lst << ", fail[lst] = " << fail[lst] << ", delta len(T) = " <<  len[lst] - len[fail[lst]] << endl; 
        
    }
}pam; 
signed main() {
    ios::sync_with_stdio(0);
    cin.tie(NULL);
    cout.tie(NULL);
    //freopen();
    //freopen();
    //time_t start = clock();
    //think twice,code once.
    //think once,debug forever.
    int n; cin >> n;  
    powp[0] = 1; for(int i = 1; i <= 1000000; i ++) powp[i] = powp[i - 1] * base % mod; 
    f(i, 1, n) {
        pam.lst = 1; pam.n = 0; pam.pre.clear(); pam.pre.push_back(0); 
        cin >> pam.s; pam.s = ' ' + pam.s; 
        for(char ch : pam.s) if(ch != ' ') pam.insert(ch); 
    }
    int ans = 0;  
    for(auto it : mp) {
        ans += it.second * it.second; 
    }
    cout << ans << endl;
    //time_t finish = clock();
    //cout << "time used:" << (finish-start) * 1.0 / CLOCKS_PER_SEC <<"s"<< endl;
    return 0;
};