// 
/*
世界の果てさえ
【世界的尽头在何处】
仆らは知らない
【我们也无从知晓】
*/
#include <cstdio>
#include <algorithm>
#include <cmath>
#include <cstring>
#include <vector>
#include <set>
#include <map>
#include <random>
#include <ctime>
#include <string>
#include <iostream>
#define pr pair <LL, LL>
#define mr make_pair
#define LL long long
#define ls tree[p].L
#define rs tree[p].R
#define uLL unsigned long long
using namespace std;
const int MAXN = 1e6 + 5, Mod = 1e9 + 7, Mod2 = 998244353;
struct node {
	int son[27], fail, len, id, ed;
}pam[MAXN];
int n, las = 1, tot = 1, mb1, mb2, c[MAXN];
vector <int> v[MAXN];
string s[MAXN];
LL P[MAXN], P2[MAXN];
vector <pr> Hash[MAXN];
map <pr, int> mp;
void read(int &x) {
	x = 0; bool f = 1; char C = getchar();
	for(; C < '0' || C > '9'; C = getchar()) if(C == '-') f = 0;
	for(; C >= '0' && C <= '9'; C = getchar()) x = (x << 1) + (x << 3) + (C ^ 48);
	x = (f ? x : -x);
}
int getfail(int x) {
	while(s[mb1][mb2] != s[mb1][mb2 - pam[x].len - 1]) x = pam[x].fail;
	return x;
}
void ins(int x) {
	int p = getfail(las), now = pam[p].son[x];
	if(!now) {
		now = ++ tot; pam[now].len = pam[p].len + 2;
		pam[now].fail = pam[getfail(pam[p].fail)].son[x]; pam[p].son[x] = now;
		pam[tot].id = mb1; pam[tot].ed = mb2;
	}
	las = now; c[las] ++;
}
void dfs(int x) {
	for(auto y : v[x]) {
		dfs(y);
		c[x] += c[y]; //printf("?%d %d %d?\n", x, y, pam[y].len);
		if(pam[y].id) pam[x].id = pam[y].id, pam[x].ed = pam[y].ed;
	}
}
pr gethash(int id, int l, int r) {
	LL p1 = ((Hash[id][r].first - (l ? Hash[id][l - 1].first * P[r - l + 1] : 0)) % Mod + Mod) % Mod;
	LL p2 = ((Hash[id][r].second - (l ? Hash[id][l - 1].second * P2[r - l + 1] : 0)) % Mod2 + Mod2) % Mod2;
	return mr(p1, p2);
}
int main() {
	read(n); pam[0].len = 0; pam[1].len = -1; pam[0].fail = pam[1].fail = 1; P[0] = 1; P2[0] = 1;
	for(int i = 1; i <= 1000000; i ++) {
		P[i] = P[i - 1] * 2007391 % Mod;
		P2[i] = P2[i - 1] * 1331 % Mod2;
	}
	for(int i = 1; i <= n; i ++) {
		cin >> s[i]; las = 1; mb1 = i; Hash[i].resize(s[i].length());
		for(int j = 0; j < s[i].length(); j ++) mb2 = j, ins(s[i][j] - 'a');
		for(int j = 0; j < s[i].length(); j ++) {
			Hash[i][j].first = s[i][j];
			if(j) Hash[i][j].first += Hash[i][j - 1].first * 2007391, Hash[i][j].first %= Mod;
			Hash[i][j].second = s[i][j];
			if(j) Hash[i][j].second += Hash[i][j - 1].second * 1331, Hash[i][j].second %= Mod2;
		}
	}
	v[1].emplace_back(0);
	for(int i = 2; i <= tot; i ++) v[pam[i].fail].emplace_back(i);
	dfs(1);
	for(int i = 2; i <= tot; i ++) {
//		if(c[i] != n) continue;
//		printf("|%d %d|\n", i, pam[i].len);
		if(pam[i].len == 1) {
			mp[gethash(pam[i].id, pam[i].ed, pam[i].ed)] ++; continue;
		}
		int len1 = pam[i].len, len2 = pam[pam[i].fail].len;
		if(len1 % (len1 - len2) == 0) {
			mp[gethash(pam[i].id, pam[i].ed - (len1 - len2) + 1, pam[i].ed)] ++;
		}
		else mp[gethash(pam[i].id, pam[i].ed - len1 + 1, pam[i].ed)] ++;
	}
	LL ans = 0;
	for(auto i : mp) ans += 1ll * i.second * i.second;//, printf("?%d?", i.second);
	printf("%lld", ans);
	return 0;
}
/*
2
aaaa
aaa
*/